I am looking through "Global Learning - Exchange Server 2003 - Instructor Guide" reading up on what they say about deploying RPC over HTTP and I have gotten down to the configuration of the rpcproxy registry entries. This is what they say should be in your Exchange 2003 rpcproxy registry setting for VaildPorts: Back-end:593;back-end.fqdn:593;back-end:6001;back-end.fqdn:6001;back-end :6002;back-end.fqdn:6002;back-end:6004;back-end.fqdn:6004;GC:539;GC.fqdn :593;GC:6004;GC.fqdn:6004 I see that everyone has their own opinion on how to setup Exchange 2003 especially when it comes to the rpcproxy port values, is there any correct way of going? Is this the correct way? Andrew