Microsoft Active Directory - Exchange Extension Error

Initial setup was Microsoft Server 2003 with Exchange Server 2003 installed.

Migrated exchange to the cloud and tried to uninstall/delete Exchange 2003.

System was working fine.

Upgraded Server 2003 Enterprise to 2008 Enterprise.  Upgrade seemed to go ok but now I am unable to edit users (add, change etc)
Get snapin error:
Microsoft Active Directory  - Exchange Extension
Facility: Win32
Id no : c007007e

The uninstall of Exchange was not very clean.  Directory still exists with many files.  Unable to remove with Add/Remove Programs.
Tim CarneyAsked:
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Scott CSenior EngineerCommented:
You upgraded Server 2003 to 2008 before you uninstalled Exchange 2003?  

If that is true, I'd hazard a guess that the AD schema made changes that Exchange 2003 doesn't understand.

Exchange (any version) doesn't deal well (to put it mildly)  with upgrading the OS underneath it.  It is not a supported process.

You might have to put a call into MS to get AD straightened out.
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Tim CarneyAuthor Commented:
No tried to uninstall exchange before any upgrade.  Was done months ago.

Just past weekend did I upgrade server to 2008.  

Also no Exchange related services running.
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Scott CSenior EngineerCommented:
Ok.  Wanted to make sure, but parts of Exchange were still there when you did the upgrade.  

Something must have been left in the schema that caused the issue.  

If possible I'd get MS involved and get both Exchange and Directory Services involved unless somebody on here has run into this.
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Peter HutchisonSenior Network Systems SpecialistCommented:
Is does not matter about Schema changes, they cannot be undone anyway and they are dormant when you uninstall Exchange anyway.
Old servers that were not uninstalled will be in the Configuration partition of AD which is where you want to look for part still visible, use the ADSIEDit tool to view it (see Services, Microsoft Exchange).
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Tim CarneyAuthor Commented:
Peter,
Found the section in AD as you mentioned but what should I actually do?
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Peter HutchisonSenior Network Systems SpecialistCommented:
Expand CN=Microsoft Exchange, then CN=<your org name>
Expand CN=Administrative Groups, CN=<admin group name>, CN=Servers

and look for any obsolete servers. If the server is gone and cannot be restored,
then as last resort, you could delete the entry for the server.
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Seth SimmonsSr. Systems AdministratorCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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