Configuring Microsoft Licensing Model Settings for Teams Chat
After you provision Microsoft Teams (Chat) with your own app, you can change the
Microsoft licensing model for the service based on your requirements.
If you have provisioned Teams Chat in the old way without creating your own
app in Azure AD, the licensing model settings are not available.
Go to Administration > Global Settings > Teams Chat Protection Mode.
Select an organization.
(Optional) Click Update Secret or Change App to replace
the secret for the current app or use another app.
The procedure is the same as the provisioning. For details, see Provisioning a Teams Chat Service Account.