Exchange 2010 Removal - AD Modifications

Greetings. We removed Exchange 2010 a while ago and moved to Office 365. Exchange was completely uninstalled and the physical server was decommissioned.

I know that some AD attributes remain in the schema from Exchange, which I'm guessing is not a problem.

Question - can I safely remove the following Security Groups from the Users ou ?
- Exchange Domain Servers
- Exchange Enterprise Servers
- Exchange Services
- Exchange Operators
- ExMerge Operators

I don't see any reason why we need these, since there is no on-premise Exchange server any more.  All user management for mail is done in the Office 365 management console (or through Powershell).

Thanks much.
-Stephen
lapavoniAsked:
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David SankovskySenior SysAdminCommented:
Rule of the Thumb is not to delete groups that have members assigned to them.
I'd first check to see if there are any AD users in those groups (Take special care with the Services group - these are sometimes users created while installing Exchange servers to run them). Other then that I see no reason to keep them around (Then again, a backup or a snapshot if it's a virtual machine is always a good step before changing the AD structure)
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lapavoniAuthor Commented:
OK, the only users in those groups are my account (Domain Admin), and a generic domain admin user (manually created by us), so it sounds like we're ok deleting them. I have a utility that does snapshots for AD object restore, so I'll do that first.
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David SankovskySenior SysAdminCommented:
Let me know how it goes and if you have any other questions.
If the delete itself throws any errors, post them here and I'll review them :)
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lapavoniAuthor Commented:
Thank you.  I deleted them.  I don't anticipate any problems, but I'll let you know.  One quick longshot - do you have any idea what a user account with the name "IBMDirector" might be ?  I'm thinking waaaay before I started, we had Tivoli or some IBM product that created that account. I plan to delete that one anyway, but can't find a reference to it.  Thanks again, David.
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lapavoniAuthor Commented:
Excellent advice.  Appreciate it much.
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David SankovskySenior SysAdminCommented:
As Far as I know there's an IBM software called IBM Director, I'm not overly familiar with it.
Check this link. It might help.
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