i am getting this error on my exchange 2010 console:
"You must provide a value for this property"
This began happening after i had a problem with having 2 exchange servers showing up and had it resolved here using ADSIEDIT:
all i did was delete the old exchange server from the list in there, so i wouldn't get any message about entering product key for it or anything.
(The reason for deleting the first exchange server was because it crashed and i reinstalled the whole OS, and installed exchange server anew, with a new computername aswell)