My set-up is windows 2000 server SBS (exchange 2000, ISA server)
I got more then just one problem with exchange. First of: OWA doesn't work properly. When i first tried to access it internally (over LAN) it wouldn't give me an inbox, it just kept saying "loading.." i solved that problem by creating a registry key which makes OWA think all clients use IE 4 or lower so it wont use the webdev thingy (cant remember what it's called).
now i can log on over the LAN. I succesfully get my inbox and the inbox of another administrator. Any other user gets the frames but left and right window say "page cannot be displayed". In my own inbox i cant open certain emails and atachments, but some can be opened and i am able to send mail.
btw, OWA is set up over SSL
another problem is that when i remove a mailbox from AD it doesnt seem to delete it properly. It leaves traces on the M:\ drive but when i click the folder it claims its already removed. our backup program has problems with backup up mailboxes beacause of that. it tries to backup non existing mailboxes.