I am getting tons of these RPC error messages. I have just installed Windows Server 2003 Enterprise R2 along with exchange 2003 enterprise and Microsoft ISA 2006 Enterprise. However, I am getting several issues with RPC. I am getting this error message in the event viewer: Windows cannot determine the user or computer name. (The remote procedure call failed. ). Group Policy processing aborted. Also I am unable to join one of my workstations to the domain, when attempting it says "changing the primary domain dns name of this computer to failed, remote procedure call failed. When I open DHCP it says "the dhcp server you specified cannot be located, the error was the remote procedure call failed". I am at a loss of what it's doing this. I have disabled the RPC filter in ISA along with disabling strict RPC policy and what not. RSS is already disabled. Really stuck here, any ideas?

Hi SBrown86,It is not recommended to install ISA 2006 and exchange server on same server. You have to install the ISA on different system and exchange on different server. Supporting link http://social.technet.microsoft.com/Forums/en-US/exchangesvrdeploy/thread/c6b9b6bc-f434-44a8-9c55-5091a2c7b8d0For further information , i would suggest you to post in exchange forums. http://social.technet.microsoft.com/Forums/en-US/category/exchangeserver

Whoops, looks like I have a reinstall to do then. Cheers!