Exchange 2010 OWA Redirect with Authentication Across AD Site

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Mat T

Hello all.

I'm in the middle of a Exchange 2010 migration and have a question. The secenario is this, we have two Exchange 2007 servers in Site A (CAS only & CAS,HUB,MB) and two Exchange 2010 servers in Site B (CAS only & CAS, HUB, MB). When user with a mailbox on 2007 logs into the CAS only 2010 server they get a redirect page with a link back to the 2007 CAS only server in Site A and must put in there authentication a second time. From what I read this is expected. However, we would like for the authentication to pass automagically. Does anyone know how to make this work. I've tried fiddling with the authentication settings on the 2007 CAS /owa virtual directory but have been unable to make it work.

Thanks in advance.

Mat
 
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