We've made it easy to allow Office 365 and on-premises administrators to help diagnose Hybrid Mailbox Move issues.
This is a troubleshooter that is designed to assist when you are having issues moving a mailbox from an on-premises Exchange environment to Exchange Online (On-Boarding). This will also assist you if you are moving a mailbox back on-premises from Exchange Online (Off-boarding).
If you are having issues determining what the best Migration Approach is for your environment please visit the Exchange Deployment Assistant.
NOTE: This troubleshooter will not help you with troubleshooting Staged, Cutover, or IMAP migrations.
To start troubleshooting Hybrid Mailbox Move issues in Office 365, go to the guided walkthrough @