Decommissioning the only Exchange 2003 server

We have uninstalled Exchange server 2003 from a 2003 infrastructure after migrating all mailboxes to 365. After a few small hurdles along the way, we managed to remove Exchange through Control Panel>Add and Remove Programs. However, there are still elements of Exchange in active directory and on the Exchange server.

The Exchange server was (is) a member server (not a domain controller)

Can anyone please advise how to cleanly and accurately remove the Exchange entries from AD. See attached screenshots which relate to the following:
•      Microsoft Exchange System Objects
•      Exchange Domain Servers (has no members)
•      Exchange Enterprise Servers (Exchange Domain Servers is the only member)
AD Exchange Entries
Do we need to run any additional process to remove Exchange from the domain (other than what occurred during the uninstall wizard)?

Given that the Exchange server is to be removed from the domain, is there any value in removing the Exchange entries in Program Files and the server registry?
Exchange Program Files
Exchange registry entries
Guidance appreciated!
swan_solutionsAsked:
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Will SzymkowskiSenior Solution ArchitectCommented:
When you uninstall Exchange 2003 properly (clean) it will remove all of the necessary objects from AD. There are however things (as you have pointed out) that are not removed automatically when uninstalling Exchange as this is due to the initial Schema update that was done on your Active Directory Environment before Exchange 2003 was presented in your environment.

You can go ahead and remove these objects but it is not required.

Will.
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swan_solutionsAuthor Commented:
Went ahead and removed the AD objects, removed the Exchange server from the domain then shut it down with no side effects.
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