[Bug] silenttoken not getting on iOS

[RaiAlka]

Library version used

Msal 1.2.9

.NET version

Application is built in native iOS using Msal sdk

Scenario

PublicClient - mobile app

Is this a new or an existing app?

The app is in production, I haven't upgraded MSAL, but started seeing this issue

Issue description and reproduction steps

Recently using new policies and facing below issue
[+oneAppLog][AzureUtility.getTokenSilently(policy:completionHandler:)] - Azure Utility acquireToken SILENTLY error : Optional(Error Domain=MSALErrorDomain Code=-50002 "(null)" UserInfo={MSALErrorDescriptionKey=User interaction is required, MSALOAuthErrorKey=invalid_grant, MSALCorrelationIDKey=9CB85855-62A1-4EFE-99FE-4EE364304B15, NSUnderlyingError=0x3007620d0 {Error Domain=MSALErrorDomain Code=-50000 "(null)" UserInfo={MSALErrorDescriptionKey=AADB2C90129: The provided grant has been revoked. Please reauthenticate and try again.
 
Correlation ID: a8589387-c7bc-429d-9322-1fe0f390de77

But if same users signing in getting silent token

Relevant code snippets

Expected behavior

For new users also silenttoken should be generated

Identity provider

Azure B2C Custom Policy

Regression

No response

Solution and workarounds

No response

[github-actions]

Here are some similar issues that might help you. Please check if they can solve your problem.

• Broker could not satisfy the silent request #4438

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Possible solution (Extracted from existing issue, might be incorrect; please verify carefully)

Solution 1:

Use Microsoft.Identity.Client only, as it worked for me when I faced a similar issue with B2C.

Reference:

• Broker could not satisfy the silent request #4438 (comment)

Solution 2:

MSAL's embedded browser is based on an old version of Internet Explorer. Broker doesn't work with B2C. You can use WebView2 - see https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/blob/main/src/client/Microsoft.Identity.Client.Desktop/DesktopExtensions.cs#L61 (you'll need to install the MSAL.Desktop package).

Reference:

• Broker could not satisfy the silent request #4438 (comment)

[bgavrilMS]

This is the SDK for .NET repo, I believe you want to open issue on the iOS repo: https://github.com/AzureAD/microsoft-authentication-library-for-objc