mailbox migration

This tag collects discussion of mailbox migration as it relates to Microsoft 365 and Exchange environments. The current focus is a Microsoft 365 Mailbox Replication Service update that adds OAuth authentication for migrations between on-premises Exchange and Microsoft 365, offering administrators an alternative to supplying credentials for a privileged on-premises Active Directory account. Coverage notes that the option supports migration batches and both onboarding and offboarding move jobs across hybrid and non-hybrid organizations, and that it remains optional rather than a forced move away from Basic authentication. Readers interested in Exchange administration, migration planning, and authentication changes during mailbox moves will find relevant material here.