Looking for the App-ID(s) that would be necessary for traffic between my on-premises Exchange 2016 management server and Microsoft's server. This is really only for moving mailboxes to the cloud. May only just be SSL traffic as that is all I really see in the monitor.
Usually it would be SSL, SMTP and ms-office365-base.
Optionally, Windows-defender-atp-endpoint and azure-logs-analytics for other purpose. As you mentioned the purpose is mailbox move, the first 3 should most likely cover for you.
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