troubleshooting Question

incoming mail with communication between exchange 2003 and 2010

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simlip asked on
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Hi there,

Since 2005, my company have one exchange 2003 on Windows 2003 Server. We use asso.local as domain. The format of the company is name@asso.org.

Recently, I decided to create a new forest/domain newasso. Local on Windows 2008 and Exchange 2010 environnement. IT is installed on recent and efficient hardware.

Now, I have one organization :
-      User uses mail with format as name@asso.org
-      One forest on Windows 2003 and Exchange 2003
-      One other forest on Windows 2008 and Exchange 2010
-      Incoming mails arrived on exchange2003

If I have well understood, Exchange 2010 uses cas for incoming mail and not smtp.
I need to have the both server  as the same time for 2 months.

If one mail is not for one user that is not on exchange 2003, I would like that mail is follow and manage by Exchange 2010. Please help me  

Sorry for my english !

Thanks,

Regards,

Simlip
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