I bound one of our new iMacs to our MS AD a while back, however a week later it stopped working out of the blue. After unbinding and trying to bind again I recieved the following error:
Unable to add server. The daemon encountered an error processing the request (10002)
After a bit of investigation, it turned out that the issue was due to the clock drifting on the Mac, and causing kerberos authentication to fail. Fixed by setting the clock to sync with a domain controller (will prevent the issue from recurring), after this it rebound straight away.