So I have 1 exchange 2003 server in my internal network, and ISA 2004. After a few tweaks I was able to have OWA working from external clients, not internal, and OMA direct push. RPC would not work.
From reading sites it seemed as if 2006 ISA was supposed to be easier. So last night I upgraded to 2006. It seems now that direct push functionality is delayed, maybe not even working but its the active sync that is. OWA is still not accessibly from the internal network. (I did setup split DNS). And RPC is still not working (is there anything special needed to be done on the exchange end?)
I don't understand why internal users cannot access OWA. The listener is on the external, the FQDN resolves to the external of the ISA server, and then split dns should kick in like it does for external clients, but the firewll log shows the internal client trying to his the external network of the ISA server, and then being denied
Ok I was able to access my outlook over ISA using RPC/HTTP. I had to uninstall RPC, reinstall i t, and then reedit the registry. Although I can connect, and its using basic authentication, I have to put in my password every time, and sometimes 2-3 times, why?
And also, I was watching the log, and I see errors on that rule showing denied access, sometimes allowed, even though I send/receive email no problem and the rpc monitor shows HTTPS connections..