Hi folks,
We feel your pain everyone. We applied SP1 around Sept 4th, weren't many issues posted at that time. We were running an all in one CAS, MBX, and HT server. Long story short, SP1 appeared to upgrade properly via the gui, however it has never been the same since. We have since deployed a new CAS server, and a HT/MBX server and migrated everything off the old box. The old MBX database is now offline, and everything is going through the new servers. I'll wait a couple more days before decommissioning.
We worked with MS Tech Support, had a good experience with a guy named Anwar out of India. Very knowledgable and freindly, I love MS tech support.
In the end though, I hope you are listening MS Exchange Team,,, this service pack did not get enough regression testing. I'm sure its too late to retract it, but please help these people! The incredible stress presented by a failed messaging and collaboration platform is off the charts. As customers, this is the kind of thing that makes us consider hosted alternatives, and MS does not always shine the brightest if you force us that way.
We like our in-house mail servers, but this has gone too far.