I ran this command on the host, and then restarted the FogService., but my issue might have been slightly different.

reg add “HKLM\System\CurrentControlSet\Control\Lsa” /v NetJoinLegacyAccountReuse /t REG_DWORD /d 1 /f

Then it joined to AD with no issues.

Are those exisiting machines in AD that you re-imaged with FOG, or were they new devices?

This only happened to us with exisitng machines in AD that we re-imaged and then couldn’t join AD again after.