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Hi,
Currently exchange hybrid configuration, all mailboxes has been moved to exchange online.
Plan:
Change the mailflow to exchange online and remove hybrid configuration, decommission onprem-exchange server.
All new account will be created directly using office 365 here after.
Questions we have:
Do we need onprem exchange? There is Ad sync currently setup for directory synchronisation between onprem ad and office 365.
Can we edit user attributes, make changes using office 365 if we decommission onprem exchange server?
what does other organisations who want to move complete exchange online do in this case?
If we can decommission onprem exchange, kindly help with the steps need to follow.
Is there any update on this thread? If the issue has been resolved, please mark the helpful replies as answers, this will make answer searching in the forum easier and be beneficial to other community members as well. Thanks for your understanding.
Since all of the users will be managed in Microsoft 365 or Office 365, and there are no other directory synchronization requirements, you can safely disable directory synchronization and remove Exchange from the on-premises environment. You could refer to the following official documents for detailed steps:
Please note:
Scenario one
@Jayce Yang-MSFT Thanks for your reply, we will be still requiring to have onprem-ad until we move to AAD and for password sync we still need to have AD sync connector.
Does this make any difference with decommissioning onprem exchange?
You should refer to Scenario Two, to keep directory synchronization and decommission most of the Exchange servers, only keep one Exchange Server for management.