Installing Exchange 2003 in an Exchange 2007 environment

What is the cost of installing an Exchange 2003 server into a current Exchange 2007 environment?
I need to use the EX2K3 server to act as a bridgehead for miration purposes from Groupwise 7 to EX2K7.

Thanks for any help!

ratanomanAsked:
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SembeeConnect With a Mentor Commented:
Did you have an Exchange 2003 server in the site before installing Exchange 2007?
If not then you cannot install Exchange 2003 in to an Exchange 2007 domain.

Simon.
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ratanomanAuthor Commented:
No, that's the problem.
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ATIGConnect With a Mentor Commented:
you cannot add Ex 2003 after 2007 if you never had it :)

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SembeeConnect With a Mentor Commented:
In that case you are going to have to build a new forest, put Exchange 2003 in to it, export the content to mailboxes on Exchange 2003 and then export them out again to be imported in to the Exchange 2007 domain. I cannot think of any other way of doing it.

Simon.
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ATIGConnect With a Mentor Commented:
kinda fubar :P I know it sux but once you in pure 07 no going back to 03....... I had to leave a 2003 virtual around for when I go to test E14 else I would have been up a creek.

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ratanomanAuthor Commented:
That's what I thought & was afraid of, thanks to all that replied!
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ratanomanAuthor Commented:
So if I built another domain and installed EX2K3, that would be a possible solution?
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ATIGConnect With a Mentor Commented:
you would have to build another forest.......
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ratanomanAuthor Commented:
Your Quick!
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