Re: obviously wasn't a recent thing
aye, I think it was exchange 5.5 that I first worked on and it would do some really weird things at times. It was also very sensitive to mailbox sizes and database sizes. I remember making registry changes to override some restrictions (a shiny new server 2000 system at the time). It was fairly voodoo back then (but the client was moving from Lotus Notes, hard to say which was funkier to work on).