We are happy to announce that Microsoft 365 Mailbox Replication Service (MRS) now supports OAuth as an authentication method when migrating mailboxes between Microsoft 365 and an on-premises Exchange...
Published Nov 09, 2026
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Blog Post
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Now available: OAuth authentication for on-premises Exchange mailbox migrations to Microsoft 365
Is it possible to limit the application to have access to some users (e.g. based on a mail-enabled security group) similar to how it works for cross-tenant mailbox migration?