Where and how are the preferences in Face Time edited
MacBook Pro OS X Mountain Lion - preferences are greyed out; Error comes up every time on server registration.
MacBook Pro, iOS 6.0.1
On my imac 10.6.8 Snow Leopard rig I simply click on the FaceTime icon, then click on "FaceTime" in the upper left corner of the screen, then click on preferences. From there ,I can edit my account, add/change e-mail addresses, etc. Hopefully this will act as a guide for your osx.