Network user accounts not displaying on log in screen
Mac Mini joined to Windows 2012 R2 Active Directory domain.
While using Sierra, the network user could access the Mac directly from power-up with his AD account from the login screen. Following the update to Mojave, the user's AD account is no longer being displayed as an option, only the local administrators account is showing. If I log in as the administrator and then log out, the option to select other accounts is then displayed.
Looking in System Preferences > Users & Groups, his account has been removed from the account list but clearly the account is still present on the Mac.
Looking in System Preferences > Security & Privacy, FileVault is off.
I do not want to have to log in and out as the administrator every time the users needs to access the Mac and as there is no way to roll back the update (thanks a bunch Apple), I need this fixing ASAP.
Does anyone know why Mojave would have removed this option and how to fix it please?
Thanks is advance.
Mac mini, macOS Mojave (10.14), null