Tabs not working after enabling Conditional Access
After enabling Conditional Access on the tenant in Microsoft Teams, some tabs no longer functioning in the desktop client as expected. However, the tabs load when using the Web Client.
The tabs affected are the website tabs and app tabs (such as Power BI, Forms, VSTS, PowerApps, and SharePoint List) that open an AAD authentication dialog requiring users to sign in with their AAD credentials.
To see affected tabs you must use Teams in Edge, Internet Explorer, or Chrome with the Windows 10 Accounts extension installed. Some tabs still depend on web authentication, which doesn't work in the Desktop Client when Conditional Access is enabled. Microsoft is working with partners to enable AAD single sign-on support, which does support Conditional Access.
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