- Login to Tenant Management System Client (TMS Client) with an account with a System Administrator role.
 - Select the organization you want to reauthorize and click Reauthorize Tenant.
 - Enter the full tenant name in an opened window (e.g. myTenant.onmicrosoft.com) and click Proceed.
 - Login with a Global Administrator account and provide consent.
 - If everything is completed correctly, the Reauthorize Tenant button will be renamed to Resync Tenant.
 
Note: When re-authorization is granted, the button will be renamed to 
Resync Tenant. It has these functions:
- It validates that the connection to the Tenant is still good for App Authorization.
 - It generates the list of domains again.
 - 
	
It will update the number of mailboxes and licensed mailboxes.
	 
 
Note: The endpoint for Teams has been changed and re-authorization is required to get most of Teams reports in Nova.