Removing Exchange 2010 leftovers from Exch 2003 in order to reinstall

Hello experts,

I have Exchange 2003 which had a failing attempt of migration to Exchange 2010. the Exchange 2010 servers were deleted without properly being un-installed.

We had administrative group containing 2 Exchange 2010 servers and I managed to remove them through the ADSI Edit.

I would like to know if there's a single tool to remove all the exchange 2010 leftovers from the eXch 2003 as I will go in the procedure again of the migration to 2010.

I would appreciate any help?
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Mohammed HamadaSenior IT ConsultantAsked:
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Will SzymkowskiConnect With a Mentor Senior Solution ArchitectCommented:
If you did not install UM initally then it should be fine. When you run the Exchange 2010 setup again, it has to write the values back into active directory (ADSIEdit). When you run the Exchange 2010 setup it will perform a check before installing to ensure that your environment is ready to install Exchange.

If there are any errors reported you will be informed before the process begins.

Will.
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Will SzymkowskiSenior Solution ArchitectCommented:
If the server no longer exists and you have removed the Exchange servers using ADSI edit they are completely gone from your Domain. You have 2 options.
- Continue to use ADSIedit to check and see if there are any other attributes related to the 2010 Exchange servers. See link for additional details - http://www.headcrash.us/blog/2011/06/removing-an-exchange-2010-server-that-no-longer-exists/

- Or use the /recover option to recover the Exchange 2010 server back to an operational state and then uninstall the server gracefully. See details at below link...
http://technet.microsoft.com/en-us/library/dd876880(v=exchg.150).aspx

Will.
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Mohammed HamadaSenior IT ConsultantAuthor Commented:
Hi Will,

Thanks for your input, I have done the steps in the first link you sent, I'm interesting in knowing if there's anything to do with the other folders that belong to exchange 2010 under organization.

for instance there's the UM role there and other stuff, Would it be ok if I left it and start the migration process once again?

Thanks
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Mohammed HamadaSenior IT ConsultantAuthor Commented:
Thanks, you're right! I didn't have any issue but had some replication performance issue between the exchange 2010 and AD.

It could be caused by the AD
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