I have just transitioned our Orion systems from Server 2003 to Server 2008 R2, and also upgraded from APM 3.5 to 4.
It's all gone brilliantly, barring one fairly serious issue:
All my basic alerts have vanished, along with all the default ones as well. Not only that, but I can't add them back in as the "Monitored Network Items" tab is blank!
Oddly enough, all my custom advanced alerts (and the default ones) are all there.


