Hello,I have a Windows 2003 domain with Exchange 2003 in Frontend Backend topology. Backend servers are clustered and Frontend servers are NLB'd. I am in the process of transitioning to Exchange 2007 from Exchange 2003. My plan is to have two servers running CAS and HT together with CAS NLB'd and HT with MS builtin redundancy using Exchange 2003 backend for a while. I managed to install CAS and HT roles on these servers. I can't locate a technote to configure CAS servers. I am interested in understanding the steps to follow to configure IIS, Virtual directories, permissions etc. on Exchange 2007 CAS to service OWA clients. I appreciate if I could get advice/ links to technote etc. to accomplish this task.Thanks in advance

http://technet.microsoft.com/en-us/library/bb885041(EXCHG.80).aspxOutlook Web Access and Exchange 2007, Exchange 2003, and Exchange 2000 Coexistencehttp://msexchangeteam.com/archive/2007/09/04/446918.aspxOverview of Exchange Server 2007 CAS Proxying and RedirectionMore Info as well:http://technet.microsoft.com/en-us/library/aa998186(EXCHG.80).aspxhttp://technet.microsoft.com/en-us/library/aa997617(EXCHG.80).aspx

Thanks very much for the links you provided.Is there a configuration guide, say for example virtual directory permissions, things to be done on IIS etc?Thanks in advance

Default settings for Exchange-related virtual directories in Exchange Server 2007http://msexchangeteam.com/archive/2008/02/01/447989.aspx