If you don't want to use the Microsoft login information, which is required by the express configuration option, you can use the custom configuration option.
Before using the custom configuration, you must register the Azure app for Teams with Azure AD.
You can either perform the app registration manually or you can use the configuration helper tool to automate the app registration.
Before You Begin
Verify that you have a user account that is licensed for Teams.
Important
The user account is added to all the Teams channels as a member so that the backup process can access the data of each team. If notifications are turned on for users, users are notified that an account was added to the channel as a member.
Procedure
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Register the Azure app by using one of the below options: