It has been working fine for months and it just now suddenly stopped. We are running Exchange 2003 on a Windows Server 2003. I already checked out to make sure OWA was running in ESM and it is. Nothing in the event logs are giving me a clue. Since I noticed this at 5am, I went ahead and did a reboot on the server since I was running out of options knowing that would probably do it.
Well, to my surprise, the reboot did nothing to help. The syntax for the link is correct (considering it's always worked before).
Any advice on what to check or how to fix this?