Hello I am trying to install Exchange 2007 Enterprise on a 2 node cluster with DAS. The server OS is Server 2003 R2 Enterprise. The installation is not allowing me to install the Client Access Role or the HUB Transport Role. Does anyone have any insight into this matter? Thank you in advance.

are you trying to install the server in a single copy cluster? those roles are not cluster aware and will need to be installed on a different server.

Yes, I was trying to install a single copy cluster. Is there a different option for installing Exchange 2007 on my current server configuration?

This is normal, this is by design You cannot install any other role on a clustered mailbox server You must install HUB and or CAS on another server Deli

the only roles that can be clustered are the Mailbox role. The Client and Hub roles are stand alone andneed to be installed on a different node. check out these resources for more info. http://technet.microsoft.com/en-us/library/bb125217.aspx

your quick Deli, beat me to it...LOL