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o365 adconnect not synchronising the administrator account

Posted on 2016-08-03
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Last Modified: 2016-08-23
I see that by design the admin accoutn isnt synchronised to 365.  We have an administrator mailbox which id like to migrate for continuity (as we dont use it very often).
Has anoyone else come across this?  What did you do?  Delete the mailbox?  Rename the account and sync it?  Create new mailbox in o365 only?
Thanks
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Question by:CHI-LTD
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by:Cliff Galiher
Cliff Galiher earned 250 total points
ID: 41740841
I assume by "the admin" account, you mean the built-in administrator account?

Best practices for active directory for the last decade (longer, actually) is to create domain/enterprise/other role-based admin accounts for users as needed. The built-in admin account should not be used beyond initially creating new additional accounts or rare emergency access issues, and certainly shouldn't have a mailbox associated with it.

If you follow that long-standing beat practice, there is never a reason for it to be synced with o365. And if you don't follow that best practice, now is a great time to transition to it.
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Todd Nelson earned 250 total points
ID: 41741620
Directory synchronization, by default, is designed not to sync the built-in administrator account.  Even if you rename the account it will not sync.

I have a couple of options for you...

For our customers, we recommend disconnecting the associated mailbox from the built-in admin account, create a new "admin" account, and then attach the disconnected mailbox to the new admin account.

Otherwise, you can export the mailbox to a PST file, delete the mailbox (not the user), create a new user with a mailbox, and then import the PST.

After that, you should see the synced account and can choose to migrate mailbox.

Alternately, you can create a cloud only mailbox and import the PST into that.
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