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E2K upgrade to E2007 with complications

We are deploying Exchange 2007 into a network of about 60 workstations.  We currently have 8 total servers: 3 DCs comprised of (1) x64 2003  server and (2) W2K DCs plus there are 5 member servers.  We are currently running Exchange 5.5 on a 2000 server that sits in its own child domain.  An AD connector appears to be installed. On the parent domain there is 1 member server that runs Exchange 2000 that appears to be functional and talking with AD but is not handling mail and doesn't appear to do anything.  I think that they intended to upgrade but aborted for some reason. I am about to forest prep and domain prep for Exchange 2007.  Do you see any problem with the existing Exchange 2000 member being present? Will the FP / DP cause any irreversible problems?  
Any thoughts and questions on this would be greatly appreciated.

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davidloch
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davidloch
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2 Solutions
 
SembeeCommented:
You need to remove the Exchange 5.5 server first. You cannot install Exchange 2007 while that Exchange 5.5 server is in place.

Simon.
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ATIGCommented:
move all mailboxes to the 2000 server remove the ADC and 5.5 then install Exchange 2007 and move mailboxes from 2000 to 2007.

http://technet.microsoft.com/en-us/library/a313c016-0e51-466e-a3de-953e1e0d347d.aspx
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davidlochAuthor Commented:
Thank you Savant & Wizard
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davidlochAuthor Commented:
I meant Sembee & ATIG
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