So Exchange 2003 SP2 running on 2003 R2 SP2 working just fine for about a month or so. This particular FE is virtualized on Hyper-V R2 (oh noes, not supported! Fsck ...

Unfortunately, the HTTP 500 internal server error message is agonizingly unhelpful; it's a generalized, catch-all that mostly indicates that the problem can't be more ...