I just had the pleasure of not properly shutting down 2 exchange 2003 servers due to some urgent issue we had..
As we were powering them up, everything seemed OK except when a user tried to login, they would get a “503 – Service Unavailable”.
Hmm ok, i thought maybe there’s something wrong with IIS so i ran an “IISRESET” and tried to login and got the same error. I thought ahh crap i hope i didn’t break the exchange server by cutting the power.
I quickly ran the through the list of running services (start > run > services.msc) and found that the “Microsoft Exchange Information Store” and the “Microsoft Exchange MTA Stacks” services weren’t running so i quickly started them and boom to my luck Outlook web access 2003 started working again..
Don’t you just love Microsoft..