Merge pull request #219251 from henrymbuguakiarie/msid-gh-issue-msal-configuration-authority-url

[msid][gh-issues] adding clarity on authority_url properties

Author: prmerger-automator[bot]

articles/active-directory/develop/msal-configuration.md

@@ -106,7 +106,7 @@ The list of authorities that are known and trusted by you. In addition to the au
 |-----------|-------------|-----------|--------|
 | `type` | String | Yes | Mirrors the audience or account type your app targets. Possible values: `AAD`, `B2C` |
 | `audience` | Object | No | Only applies when type=`AAD`. Specifies the identity your app targets. Use the value from your app registration |
-| `authority_url` | String | Yes | Required only when type=`B2C`. Specifies the authority URL or policy your app should use  |
+| `authority_url` | String | Yes | Required only when type=`B2C`. Optional for type=`AAD`. Specifies the authority URL or policy your app should use  |
 | `default` | boolean | Yes | A single `"default":true` is required when one or more authorities is specified. |
 
 #### Audience Properties