"Uploading custom apps is not allowed" When Installing Microsoft Teams Sample App

[ForumBot]

"Uploading custom apps is not allowed" When Installing Microsoft Teams Sample App

[ForumBot]

I had the same problem and it actually made me crazy especially because it may take a few hours to apply changes. Finally I was able to resolve the problem in the following way. I can imagine that certain steps are unnecessary but who knows.

- By following instructions in the [Manage app setup policies in Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/teams-custom-app-policies-and-settings), enable "Upload custom apps" in "Global (Org-wide default)".

- Following same instructions created a custom setup policy with enabled "Upload custom apps".

- Enable all permissions in "Global (Org-wide default)" as described in the [Manage app permission policies in Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/teams-app-permission-policies)

- Create a new permission policy with everything enabled.

- Wait about an hour.

- Assign these new policies to the user.

- Make sure that everything what is mentioned in [Manage custom app policies and settings in Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/teams-custom-app-policies-and-settings) is enabled.

- Wait another hour.

- Quit desktop application, and start it again.

Now, finally, it works.