Sendmail and Exchange 2010 coexistens!

Hi there

I have a problem I was wondering some of you guys could help me with!

I'm going to install a new installation of Exchange 2010, and I already have an sendmail based pop3 solution.

The case is that I want to gradually move the users from sendmail to Exchange, like only a test group. And then after a while the rest of the bunch.

The problem is like I see it, they have the same e-mail address domain and the e-mails would not be sent to the right server from outside, because the mx record still points at the sendmail server.

And e-mails from exchange server to an recipient thats on the sendmail server would probably not be routed correctly!

Do anyone have an idea what I should to to get around this for my test period?
froandAsked:
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froandConnect With a Mentor Author Commented:
I found a solution:
We used whats called shared namespace in Exchange 2010.

Added the domain as an accepted internal relay domain and configured an send connector with the sendmail server as an smarthost.

Works perfectly :)
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jessmcaCommented:
keep all emails going to sendmail and forward emails for select users to exhcange.  Configure their outlook clients to collect from exchange
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froandAuthor Commented:
ok, that might work. But how should I configure the exchange server? Should I configure e-mail domain as an accepted domain?

How should I forward the mail, they only have one e-mail adress?

Thanks
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