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Disconnecting / Removing - Directory Sync (O365) with Domain AD Forest

Posted on 2016-08-10
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Last Modified: 2016-08-10
Hey guys, I have a question. I may already know the answer but I haven't actually "done" this specific task in a production environment. The question(s) is pretty straigtht forward.

I currently have an environment where my domain AD (on-premise) is synchronized into Office 365's list of users for purposes of Sharepoint management, password sync and so on. Those users are tagged with a title "Synced with Active Directory" while other users that were created on the O365 web console, list as "In Cloud".

My question are as follow. If I were to remove, disconnect or essentially power off the onpremise server that is running the Active Directory Sync (DirSync).

  1. What will happen to those users on the O365 console tagged "Synced with Active Directory", do they essentially become manageable only through the web portal or will they break preventing those specific users from signing into O365 services?
  2. How will this effect future management - such as resetting passwords, renaming, etc.
  3. Lastly, will they get deleted after 'x' amount of time has passed?

Any other helpful pointers or comments are appreciated. Thank you for shedding additional light on this matters as well.
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Question by:zenki_fc
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Vasil Michev (MVP) earned 500 total points
ID: 41750839
They will remain "synced", i.e. you will not be able to make any changes from the cloud. Users will still be able to login, you will simply not be able to manage them. And no, they will not get automatically removed.

If you want to "break" directory synchronization, simply disable it from the portal or via PowerShell:

Set-MsolDirSyncEnabled -EnableDirSync $false

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Once you disable it, you can manage them as any other cloud user.
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by:zenki_fc
ID: 41750855
Vasil, thanks for the prompt reply and shedding light into this thread.

I figured this would be the case but I wasnt entirely sure without setting up another test environment. Quite frankly, i don't have the time to do that.

Thanks again!
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