On the CAS2010 server(s), they establish a connection to the CAS2007 server's drive that contains the Exchange binaries and navigate to the \Client Access\OWA directory (e.g. \\cas2007nonIFAD\c$\Program Files\Microsoft\Exchange Server\Client Access\Owa).
They then copy the highest version folder (e.g. today your SP2 build is 188.8.131.52) from the CAS2007 server to the CAS2010 Exchange binaries \Client Access\OWA directory (e.g. C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\Owa).
They then execute IISReset on all the CAS2010 machines.
Thank you for your Reply. I did copy the Binany Files, but does it matter which 2007 CAS I copy it from ?
In the diagram above, under NEW. I copied the Binary Files of the CAS 2007 in AD Site 1 , into CAS 2010 in AD Site 2. Both CAS 2007 AD Site 1, and CAS 2007 AD Site 2, have the same ver (8.3 build 8.6).
Does Legacy.Domain.com still play a role in this setup ?
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