Hi @T Crha
Thanks for visiting our forum. Microsoft Teams tag is mainly focused on the general issue of Microsoft Teams application troubleshooting.
I am wondering if anyone can advise me how to properly configure Teams app permission policies in my organization.
You can set the app permission policies your organization needs under Teams apps in the Teams admin center, including Microsoft apps, third-party apps, and custom apps.
So what I intend to do is to create custom app permission policies, for each third party app allowed this way, that I will assign on per user basis.
When you create a custom app policy, make sure that third-party apps are allowed. In addition, the ability of users in your organization to add apps to Teams is also affected by the client's settings. Make sure Allow users to add apps is checked in the client.
For more details about managing Teams app, you could refer to: https://learn.microsoft.com/en-US/microsoftteams/manage-apps?WT.mc_id=TeamsAdminCenterCSH
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