I've just installed Exchange 2010 R2 as a transition from 2003 and everything seems to have gone well and I'm half way through moving across the mailboxes. The only issue I have is that I cannot access OWA via Exchange 2010 and even the 2003 OWA has stopped working.
I am currently running a casarray with NLB called cassaray.domain.org.uk and have 2 x CAS servers in it called SVREX10CH and SVREX10HC.
When I go to the configured internal owa URL for either server eg https://SVREX10CH.domain.org.uk/owa
it gives a certificate warning (we don't have an SSL one yet) but then nothing.
Any help with this would be appreciated. Thanks.