Adding and deleting the Teams Application several times, especially in a short duration, from the Microsoft Teams Connector portal, can lead to cache errors in Microsoft Office. Deleting the application from Microsoft Office is one of the most effective tools for correcting the situation.

How to Delete the Teams Application

Follow these steps to remove the App from the Teams Admin Center

Go to Teams Admin Center >Teams Apps>Manage Apps and search for the App you created in the Microsoft Teams Connector Teams portal, which should also appear in the Teams User.

The app is shown in the Teams Admin menu on the left and from within Teams on the right.  Click Actions >Delete.

In the Azure Active Directory Admin Center, click “Azure Active Directory” and then "Groups" under Manage. Find the group used for the old app deployment and delete it permanently.

Wait at least 30 minutes to give Microsoft time to propagate the change.

Using the Microsoft Teams Phone Connector Enterprise portal, reprovision the Teams Application.