Teams Tab Blazor App Works in Web but Not Desktop – SSO / Access Denied Issue

Hi all,

I have developed a Teams tab application using Blazor with Azure AD SSO. It works perfectly in the Teams Web interface, but fails in Teams Desktop app.

Troubleshooting details
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Correlation Id: 2607e281-e81f-429f-95b6-755f4b30968d
Timestamp: 2025-10-07T09:42:34.000Z
DPTI: d2bf8e81894be21be1d5e1818fa47b2d8975c91c3d0eceb6622a99cc1fc8b8f1
Message: Access denied for the resource.
Tag: 4usp7
Code: 3399614468

I would appreciate guidance on how to make the Blazor Teams tab work in both Web and Desktop using SSO.

Thanks!

Tahir