Forum Discussion
Do I need to keep an Exchange server after migrating all my mailboxes to Office 365
Hey Jason,
you're right. Microsoft recommends that you have an Exchange on Premise to configure mail settings for users.
If you uninstall Exchange on Premise you can't setup Email Address Policies or additional ProxyAddresses.
With Office 365 Plans you get an free Exchange Server Hybrid Key: http://aka.ms/hybridkey
Kind regards
Andi
Andrew,
Thanks for your response! I have gotten my Hybrid Exchange key, thanks to your link. Now, my next issue is how to set up one of my existing Exchange servers as the hybrid. We have already migrated all the mailboxes to Office 365 and are using Azure AD Connect to sync passwords. I have looke3d for some guidance as to what to do next but found nothing.
Do you have any thoughts?
Hi Jason,
The best way to do is to install a new Exchange on the organization, put the hybrid key and do all configurations on that server (Certificate, URL's, services, etc), move the system mailboxes to that server to the default database without any users and then uninstall the other servers.
That makes sense. My problem is that since I did a cut-over migration, all my users still show as being in the Exchange database. Do you now if there is a way to change user attributes to reflect the mailbox being in the cloud Exchange?
Hi Jason,
You have to delete that users mailboxes and then you have to copy the Exchange Online GUID back to On-Premises to match the user in AD and tell that user is a Remote Mailbox.
