I have two questions. Can one have Forms Based Authentication on the ISA 2004 Server as well as RPC over HTTPS or does one need to install another NIC to create a different listener on with Basic Authentication for the RPC over HTTPS and FBA for Secure OWA publishing on the other listener. Also we have a two node MS Cluster with Exchange Server running on a virtual server in an active / passive configuration. IIS has a Default Web Site with /RPC as a virtual directory and an Exchange Web Site with /Exchange /ExchWeb etc. as virtual directories of the Exchange Web Site. As a result I can't seem to get RPC to work, does anyone have any ideas. Thanks