For more information, see What you need to know about migrating your IMAP mailboxes to Microsoft 365 or Office 365 on how to create an IMAP migration batch.
If you are needing to create a new IMAP migration batch, you can select the + to get started. If you are not sure where to create a batch or you are not sure if you have an existing batch, sign in to the Exchange Admin Center (EAC) using your Office 365 tenant administrator credentials and navigate to Recipients > Migration. Were you able to create/start the IMAP migration batch If your migration is taking longer than expected, choose the second option. If you are having trouble starting the IMAP migration batch, or you are running into problems after starting it, then choose the first option below. Which type of issue are you having with your IMAP migration This troubleshooter will not help you with troubleshooting Staged, Cutover, or Hybrid migrations.
