Outlook 2003 running on Windows Server 2003 Service Pack 1 cannot connect to an Exchange 2003 server through ISA Server 2004 Enterprise Edition. Earlier versions of Outlook may also be affected.
ISA Server 2004 Enterprise Edition RPC Filter Blocks Outlook Traffic from Computers Running Windows Server 2003 Service Pack 1
ISA Server 2004 Enterprise Edition RPC Filter Blocks Outlook Traffic from Computers Running Windows Server 2003 Service Pack 1
