Merge pull request #97207 from bolt-io/patch-3

Added context to B2C custom attribute requirements

Author: Jak-MS

articles/active-directory-b2c/user-flow-custom-attributes.md

@@ -143,9 +143,12 @@ You can create these attributes by using the portal UI before or after you use t
 
 |Name     |Used in |
 |---------|---------|
-|`extension_loyaltyId`  | Custom policy|
+|`extension_loyaltyId` | Custom policy|
 |`extension_<b2c-extensions-app-guid>_loyaltyId`  | [Microsoft Graph API](microsoft-graph-operations.md#application-extension-directory-extension-properties)|
 
+> [!NOTE] 
+> When using a custom attribute in custom policies, you must prefix the claim type ID with `extension_` to allow the correct data mapping to take place within the Azure AD B2C directory.
+
 The following example demonstrates the use of custom attributes in an Azure AD B2C custom policy claim definition.
 
 ```xml