This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(96, 22%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAE%3C/text%3E%3C/svg%3E)
Hi,
We've succeeded to migrate users to cloud also creating SMTP relay in Exchange online for on-premises applications, we've only one mailbox server 2016 and we need to remove it.
We planned to keep azure ad connect server up and running to sync users to cloud.
Thanks,
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(41.6, 80%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAL%3C/text%3E%3C/svg%3E)
Hi @ Ahmed Essam,
Does this issue have any updates?
If it has been resolved, please click "Accept as answer" to mark useful post or share your solution, your action would benefit others who have similar issues.
If you have any questions or need further assistance, please feel free to post back. Thanks!
Ahmed, if you have migrated all your users mailboxes and data over to Exchange online I will suggest you to follow the scenarios and process listed over here - https://video2.skills-academy.com/en-us/exchange/decommission-on-premises-exchange
Scenario 2 will work for you as you want to retain the AAD Connect and sync users. Goodluck my friend.
Hi @ Ahmed Essam ,
If you still need to keep directory synchronization or need to use Exchange for other purposes（e.g. SMTP relay）, it's not supported to remove the last Exchange server.
You need to keep at least one Exchange server on-premises for recipient management.
In scenario two of this document, the actual state required to preserve directory synchronization is shown:
You can also learn more from the other two scenarios mentioned in the article.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.