Entra External ID Custom URL Domain Broken

### Copilot Usage Confirmation

- [x] I have tried using GitHub Copilot to resolve this issue.

### MSAL Version

2.4.1

### Description

I'm trying to follow this guide to enable a custom URL domain for Entra External ID:

[how-to-custom-url-domain](https://learn.microsoft.com/en-us/entra/external-id/customers/how-to-custom-url-domain)

When I try to follow this to setup the iOS app for the custom domain:

[iOS Swift Prepare App Custom URL Domain](https://learn.microsoft.com/en-us/entra/identity-platform/tutorial-mobile-app-ios-swift-prepare-app?toc=%2Fentra%2Fexternal-id%2Ftoc.json&bc=%2Fentra%2Fexternal-id%2Fbreadcrumb%2Ftoc.json&pivots=external#use-custom-url-domain-optional)

I get this error using `https://my.custom.domain/<tenant GUID>` authority per the instructions:

```
acquireToken returning with error: (MSALErrorDomain, -50000) AADSTS399266: Blob grant token received with wrong issuer type. Trace ID: f0e975e1-ff21-43f5-bd8a-fd64297d0600 Correlation ID: 5a25ce8b-f257-44d9-8c2c-83eef3e6303e Timestamp: 2025-09-28 22:36:13Z
```

If I change the authority to `https://my.custom.domain/<tenant subdomain>.onmicrosoft.com` I get further but get stopped by:

`Creating Error with description: It is not CIAM authority.` which causes the tokens returned to be nil even though I believe MSAL is receiving valid tokens.

I have gotten the custom domain to work on Android and SPA platforms with no issue. The iOS app works fine without the custom domain.

### Error Details

acquireToken returning with error: (MSALErrorDomain, -50000) AADSTS399266: Blob grant token received with wrong issuer type. Trace ID: f0e975e1-ff21-43f5-bd8a-fd64297d0600 Correlation ID: 5a25ce8b-f257-44d9-8c2c-83eef3e6303e Timestamp: 2025-09-28 22:36:13Z

Creating Error with description: It is not CIAM authority.

### MSAL Logs

MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Creating Error with description: It is not CIAM authority.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Default app's access group: "Masked(not-null)".
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Using "Masked(not-null)" Team ID.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Init MSIDKeychainTokenCache with keychainGroup: Masked(not-null)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Creating Error with description: It is not CIAM authority.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (Default cache) Get app metadata entries with clientId 945ee6ea-17dd-4bb5-92df-4ebc10c3701e, environment (null)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(null) service: appmetadata-945ee6ea-17dd-4bb5-92df-4ebc10c3701e generic: (null) type: 3001, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 2 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (Default accessor) Get accounts.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (Default accessor) Get accounts with environment (null), clientId 945ee6ea-17dd-4bb5-92df-4ebc10c3701e, familyId , account (null), username (null)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (Default cache) Get accounts with environment (null), unique user id Masked(null)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(null) service: (null) generic: (null) type: 1003, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 11 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(not-null) service: useSingleFRT generic: (null) type: (null), keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: -25300
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 0 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] No FRT cache entry found, returning NO
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] FRT flight set to keep current status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (MSIDAccountCredentialCache) retrieving cached credentials using credential query
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(null) service: (null) generic: (null) type: 2002, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: -25300
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 0 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (MSIDAccountCredentialCache) retrieved 0 cached credentials
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (MSIDAccountCredentialCache) credential query requires exact match with the cached credential items. Performing additional filtering checks.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (MSIDAccountCredentialCache) returning 0 filtered credentials
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (Default accessor) Looking for token with aliases (null), tenant (null), clientId 945ee6ea-17dd-4bb5-92df-4ebc10c3701e, scopes (null)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (MSIDAccountCredentialCache) retrieving cached credentials using credential query
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(null) service: (null) generic: (null) type: 2003, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: -25300
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 0 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (MSIDAccountCredentialCache) retrieved 0 cached credentials
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (MSIDAccountCredentialCache) credential query requires exact match with the cached credential items. Performing additional filtering checks.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (MSIDAccountCredentialCache) returning 0 filtered credentials
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(not-null) service: 945ee6ea-17dd-4bb5-92df-4ebc10c3701e generic: (null) type: 5001, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 1 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(not-null) service: 945ee6ea-17dd-4bb5-92df-4ebc10c3701e generic: (null) type: 5001, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 1 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(not-null) service: 945ee6ea-17dd-4bb5-92df-4ebc10c3701e generic: (null) type: 5001, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 1 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(not-null) service: 945ee6ea-17dd-4bb5-92df-4ebc10c3701e generic: (null) type: 5001, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 1 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(not-null) service: 945ee6ea-17dd-4bb5-92df-4ebc10c3701e generic: (null) type: 5001, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 1 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(not-null) service: 945ee6ea-17dd-4bb5-92df-4ebc10c3701e generic: (null) type: 5001, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 1 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(not-null) service: 945ee6ea-17dd-4bb5-92df-4ebc10c3701e generic: (null) type: 5001, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 1 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(not-null) service: 945ee6ea-17dd-4bb5-92df-4ebc10c3701e generic: (null) type: 5001, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 1 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(not-null) service: 945ee6ea-17dd-4bb5-92df-4ebc10c3701e generic: (null) type: 5001, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 1 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(not-null) service: 945ee6ea-17dd-4bb5-92df-4ebc10c3701e generic: (null) type: 5001, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 1 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(not-null) service: 945ee6ea-17dd-4bb5-92df-4ebc10c3701e generic: (null) type: 5001, keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 1 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (Default accessor) No accounts found in default accessor.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to get wipe info...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Wipe query: Masked(not-null)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get wipe info status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (Legacy accessor) Get accounts with environment (null), clientId 945ee6ea-17dd-4bb5-92df-4ebc10c3701e, familyId , account identifier (null), legacy identifier (null)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get keychain items, key info (account: Masked(null) service: (null) generic: {length = 17, bytes = 0x4d534f70656e546563682e4144414c2e31} type: (null), keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Keychain find status: -25300
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Found 0 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (Legacy accessor) Found no refresh tokens
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Trying to get wipe info...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Wipe query: Masked(not-null)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] Get wipe info status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:18] (Default accessor) No accounts found in other accessors.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:22] Requiring default broker type due to app being built with iOS 13 SDK
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:22 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] -[MSALPublicClientApplication acquireTokenWithParameters:(
    "945ee6ea-17dd-4bb5-92df-4ebc10c3701e/EndCustomers.Read"
)
                                     extraScopesToConsent:(null)
                                                  account:Masked(null)
                                                loginHint:Masked(null)
                                               promptType:MSALPromptTypeSelectAccount
                                     extraQueryParameters:(null)
                                                authority:(null)
                                              webviewType:MSALWebviewTypeDefault
                                            customWebview:No
                                            correlationId:(null)
                                             capabilities:(null)
                                            claimsRequest:(null)]
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:22 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Beginning interactive flow.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:22] Start background app task with type 0 & taskId : 3
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:22 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Get keychain items, key info (account: Masked(not-null) service: useSingleFRT generic: (null) type: (null), keychainGroup: adal keychain group)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:22 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to find keychain items...
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:22 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain find status: -25300
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:22 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Found 0 items.
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:22 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] No FRT cache entry found, returning NO
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:22 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] FRT flight set to keep current status: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:22 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Resolving authority: Masked(not-null), upn: Masked(null)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:22 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Resolved authority, validated: NO, error: 0
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:23 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] No cached preferred_network for authority
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:23 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Start webview authorization session with webview controller class MSIDSystemWebviewController: 
App is being debugged, do not track this hang
Hang detected: 0.93s (debugger attached, not reporting)
App is being debugged, do not track this hang
Hang detected: 1.62s (debugger attached, not reporting)
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:32 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Result from authorization session callbackURL host: auth , has error: NO
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:32 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] No cached preferred_network for authority
MSAL log: TID=936689 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:32 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Sending network request: (not-null), headers: (not-null)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] session:didReceiveChallenge:completionHandler - nsurlauthenticationmethodservertrust. Host: login.getlucho.com. Previous challenge failure count: 0
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Received network response: (not-null), error (null)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Parsing telemetry header: 1,0,0,,
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Parsing telemetry header: 1,0,0,,
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Creating Error with description: Trying to initialize AAD authority with CIAM authority url.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Failed to initialize issuer authority with error MSIDErrorDomain, -51112
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Parsed response: (not-null), error (null), error domain: (null), error code: 0
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Error is nil, reset MSID telemetry
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Stop background task with type 0 & taskId : 3
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Validate and save token response...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] Token extraction. Attempt to extract the data from the server response.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Creating Error with description: It is not CIAM authority.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] 0 enrollmentId(s) found in cache
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] home_account_id is passed in, but cannot find matching enrollment id.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] 0 enrollmentId(s) found in cache
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] user_id is passed in, but cannot find matching enrollment id.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Creating Error with description: It is not CIAM authority.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Creating Error with description: It is not CIAM authority.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Creating Error with description: It is not CIAM authority.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Creating Error with description: It is not CIAM authority.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Get keychain items, key info (account: Masked(not-null) service: 945ee6ea-17dd-4bb5-92df-4ebc10c3701e generic: (null) type: 5001, keychainGroup: adal keychain group)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to find keychain items...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain find status: 0
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Found 1 items.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Saving metadata item info Masked(not-null)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Set keychain item, key info (account: Masked(not-null) service: 945ee6ea-17dd-4bb5-92df-4ebc10c3701e, keychainGroup: adal keychain group)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to update keychain item...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain update status: 0
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Saving token response, only save SSO state 0
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] (Default accessor) Saving multi resource refresh token
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Creating Error with description: It is not CIAM authority.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] 0 enrollmentId(s) found in cache
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] home_account_id is passed in, but cannot find matching enrollment id.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] 0 enrollmentId(s) found in cache
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] user_id is passed in, but cannot find matching enrollment id.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] (Default cache) Removing credentials with type AccessToken, environment login.getlucho.com, realm /luchocustomers.onmicrosoft.com, clientID 945ee6ea-17dd-4bb5-92df-4ebc10c3701e, unique user ID c6513bac, target 945ee6ea-17dd-4bb5-92df-4ebc10c3701e/GroupMember.ReadWrite.All 945ee6ea-17dd-4bb5-92df-4ebc10c3701e/User.Read 945ee6ea-17dd-4bb5-92df-4ebc10c3701e/EndCustomers.Read
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] (MSIDAccountCredentialCache) retrieving cached credentials using credential query
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Get keychain items, key info (account: Masked(not-null) service: (null) generic: {length = 80, bytes = 0x61636365 7373746f 6b656e2d 39343565 ... 736f6674 2e636f6d } type: 2001, keychainGroup: adal keychain group)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to find keychain items...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain find status: -25300
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Found 0 items.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] (MSIDAccountCredentialCache) retrieved 0 cached credentials
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] (MSIDAccountCredentialCache) credential query requires exact match with the cached credential items. Performing additional filtering checks.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] (MSIDAccountCredentialCache) returning 0 filtered credentials
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] (Default cache) Removing multiple credentials
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] (Default cache) Saving token Masked(not-null) for userID c6513bac with environment login.getlucho.com, realm /luchocustomers.onmicrosoft.com, clientID 945ee6ea-17dd-4bb5-92df-4ebc10c3701e,
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Saving keychain item, item info Masked(not-null)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Set keychain item, key info (account: Masked(not-null) service: accesstoken-945ee6ea-17dd-4bb5-92df-4ebc10c3701e-/luchocustomers.onmicrosoft.com-945ee6ea-17dd-4bb5-92df-4ebc10c3701e/groupmember.readwrite.all 945ee6ea-17dd-4bb5-92df-4ebc10c3701e/user.read 945ee6ea-17dd-4bb5-92df-4ebc10c3701e/endcustomers.read, keychainGroup: adal keychain group)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to update keychain item...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain update status: -25300
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to add keychain item...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain add status: 0
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Creating Error with description: It is not CIAM authority.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] (Default cache) Saving token Masked(not-null) for userID c6513bac with environment login.getlucho.com, realm /luchocustomers.onmicrosoft.com, clientID 945ee6ea-17dd-4bb5-92df-4ebc10c3701e,
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Saving keychain item, item info Masked(not-null)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Set keychain item, key info (account: Masked(not-null) service: idtoken-945ee6ea-17dd-4bb5-92df-4ebc10c3701e-/luchocustomers.onmicrosoft.com-, keychainGroup: adal keychain group)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to update keychain item...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain update status: -25300
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to add keychain item...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain add status: 0
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] (Default accessor) Saving SSO state
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Creating Error with description: It is not CIAM authority.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] (Default cache) Saving token Masked(not-null) for userID c6513bac with environment login.getlucho.com, realm (null), clientID 945ee6ea-17dd-4bb5-92df-4ebc10c3701e,
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Saving keychain item, item info Masked(not-null)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Set keychain item, key info (account: Masked(not-null) service: refreshtoken-945ee6ea-17dd-4bb5-92df-4ebc10c3701e--, keychainGroup: adal keychain group)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to update keychain item...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain update status: -25300
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to add keychain item...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain add status: 0
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Creating Error with description: It is not CIAM authority.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Saving app's metadata Masked(not-null)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Saving keychain item, item info (clientId=945ee6ea-17dd-4bb5-92df-4ebc10c3701e environment=login.getlucho.com familyId=)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Set keychain item, key info (account: Masked(not-null) service: appmetadata-945ee6ea-17dd-4bb5-92df-4ebc10c3701e, keychainGroup: adal keychain group)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to update keychain item...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain update status: 0
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Creating Error with description: It is not CIAM authority.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] (Default cache) Saving account Masked(not-null)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Get keychain items, key info (account: Masked(not-null) service: /luchocustomers.onmicrosoft.com generic: (null) type: 1003, keychainGroup: adal keychain group)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to find keychain items...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain find status: 0
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Found 1 items.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Saving keychain item, item info Masked(not-null)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Set keychain item, key info (account: Masked(not-null) service: /luchocustomers.onmicrosoft.com, keychainGroup: adal keychain group)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to update keychain item...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain update status: 0
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Saved token response successfully.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Interactive flow finished. Result (not-null), error: 0 error domain: (null)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Saving keychain item, item info <MSIDThrottlingMetaData: 0x12902ea00>
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Set keychain item, key info (account: Masked(not-null) service: Ver1, keychainGroup: adal keychain group)
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Trying to update keychain item...
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] Keychain update status: 0
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Creating Error with description: It is not CIAM authority.
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34] Parsing result access token
MSAL log: TID=937150 MSAL 2.4.1 iOS 18.6.2 [2025-09-28 22:54:34 - E3BDE9CE-11E6-4951-9187-4D24B69D4460] [MSAL] acquireToken returning with at: f728d25 scopes:(
    "945ee6ea-17dd-4bb5-92df-4ebc10c3701e/GroupMember.ReadWrite.All",
    "945ee6ea-17dd-4bb5-92df-4ebc10c3701e/User.Read",
    "945ee6ea-17dd-4bb5-92df-4ebc10c3701e/EndCustomers.Read"
) expiration:2025-09-29 00:00:21 +0000

### Reproduction Steps

1. Create an Entra External ID tenant
2. Verify a domain
3. Set it as a custom URL
4. Follow guides in issue description

### Expected Behavior

MSAL for iOS works with a custom URL domain and Entra External ID

### Regression

_No response_

### Screenshots & Screen Recordings

_No response_

### Additional context

_No response_

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Entra External ID Custom URL Domain Broken #2737

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Entra External ID Custom URL Domain Broken #2737

Description

Copilot Usage Confirmation

MSAL Version

Description

Error Details

MSAL Logs

Reproduction Steps

Expected Behavior

Regression

Screenshots & Screen Recordings

Additional context

Metadata

Metadata

Assignees

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Type

Projects

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Development

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