Convert the on-premises user account to a mail-enabled user. To do this, use Exchange Management Shell on the on-premises Microsoft Exchange server to run the following command:
Enable-MailUser -Identity User -ExternalEmailAddress <user>@<domain>.mail.onmicrosoft.com
Obtain the Exchange GUID of the Microsoft 365 mailbox. To do this, follow these steps:
Update the on-premises mail-enabled user to use the Exchange GUID of the Microsoft 365 mailbox. To do this, use Exchange Management Shell to run the following command:
Move the mailbox from Microsoft 365 to the on-premises domain. You can do this by using the Exchange Management Console or the Exchange Management Shell.
For example, use the Exchange Management Shell to run the following command:
This learning path examines how organizations should plan for and implement identity synchronization in a hybrid Microsoft 365 deployment. You learn how to implement Microsoft Entra Connect Sync and Microsoft Entra Cloud Sync, and how to manage synchronized identities.
If you’re an administrator who deploys and manages Microsoft 365 and performs Microsoft 365 tenant-level implementation and administration of cloud and hybrid environments, this certification is designed for you.