Office 365 [Solved] – Migration Permanent Exception: You can’t use the domain because it’s not an accepted domain for your organization

Hello folks, In one of our Migration projects from on-premises exchange to Exchange online (Office 365), we enabled Directory Synchronization using AD Connect tool, All on-premises users was synchronized to Azure AD successfully. After enabling Hybrid Configuration wizard, we migrated a lot of mailboxes without any issues, few number of mailboxes failed to be migrated …

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