[Bug] UWP application fails WACK with latest version of Microsoft.Identity.Client

[YakubMordon]

Library version used

4.66.1

.NET version

Microsoft.NETCore.UniversalWindowsPlatform 6.2.14

Scenario

PublicClient - desktop app

Is this a new or an existing app?

The app is in production, and I have upgraded to a new version of MSAL

Issue description and reproduction steps

I have trouble with passing WACK using Microsoft.Identity.Client 4.66.1

To reproduce bug you need to:

1. Create UWP Application
2. Download Microsoft.Identity.Client 4.66.1 from NuGet
3. Publish application in Release mode
4. Perform WACK testing on application

End result should show such error:

Expected behavior

WACK testing should pass Supported API test

Identity provider

Microsoft Entra ID (Work and School accounts and Personal Microsoft accounts)

Regression

4.29.0

Solution and workarounds

Only workaround I found is to downgrade version of Microsoft.Identity.Client to version 4.29.0.
Maybe there's higher stable version of MSAL, but I hadn't looked at this

[bgavrilMS]

UWP is not longer supported. Please see: https://devblogs.microsoft.com/identity/uwp-xamarin-msal-net-deprecation/

[charlesroddie]

Only workaround I found is to downgrade version of Microsoft.Identity.Client to version 4.29.0. Maybe there's higher stable version of MSAL, but I hadn't looked at this

@YakubMordon the latest version supporting UWP is 4.60.4.

All this advice suggesting to migrate to WinUI is silly. WinUI requires full trust deployment right now for non-trivial apps (microsoft/WindowsAppSDK#3447) and is so is a completely insecure method of application delivery.