How to uninstall Exchange 2000 from Win 2003 Server


I mistakenly installed Exchange 2000 on Win 2003 Server, not realizing it's not supported.

When I try to remove it, I get an error message saying "One or more users currenlty use a mailbox on this server.  These users must be used to a mailbox store on a different server."

I don't want to move the mailbox store to a different server.  Nor do I have another server to move it to (and wouldn't know how if I did).  I just want to get rid of Exchange 2000 altogether, so that I can install Exchange 2003.

(On that note, upgrading from Exchange 2000 to 2003 on Server 2003 doesn't work either, so it appears removing Exchange 2000 is my only option).
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If you do that then your mailbox store will be lost.  Don't see any way around it.

quiTechAuthor Commented:
I don't mind the mailbox store being lost.  There's nothing in it.  

Problem is it won't let me uninstall because of of the user associated to the mailbox.  How do I get rid of that?
Have you checked Systems Manager to see the user's mailbox?

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quiTechAuthor Commented:
I don't see anything in Exchange Systems Manager that would show a mailbox.  The mailbox store itself is not mounted, because Exchange 2000 won't run on Win 2003.

I thought maybe I can do something in AD Users and Computers, but there is nothing I can see that would allow me to get rid of a mailbox.
Sam PanwarSr. Server AdministratorCommented:
quiTechAuthor Commented:

Here is how I ended up working it.  It turns out that if you upgrade the non-working version of Exchange 2000 to SP3, you can then upgrade it to Exchange 2003.
PAQed with points refunded (500)

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Windows Server 2003

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