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The original was posted on /r/sysadmin by /u/ExecuteArgument on 2024-01-19 12:04:01+00:00.
Hi all, would anyone be able to recommend what should be done in this scenario.
We have a hybrid on-prem AD synced to the cloud (Azure/365/whatever) environment, users are created on-prem and then synced to the cloud, their mailboxes are created in Exchange Online. We do a similar thing for Shared Mailboxes and Room Mailboxes/Calendars (create user on-prem, sync it, license it, a mailbox is generated, change the mailbox type to SharedMailbox, then remove the license and keep the on-prem account disabled).
I've noticed that some mailboxes have been created in the cloud first, likely by someone who didn't know what they were doing or wasn't trained properly, and I'd like to try and convert those cloud 'native' objects to on-prem ones, so they then sync back to the cloud. I could simply delete the cloud object, wait a bit, and then re-create it on-prem and wait for it to sync. However my concern is that any emails, calendar appointments, etc in that mailbox could be lost by doing so.
Has anyone else had to do this and how did you rectify it? TIA