More information would be helpful, like the error or response codes they are getting when they attempt to sign in.
Odds are the issue is on AD's side. Things to check:
- The user's PW is wrong.
- The user's PW does not meet the network requirements.
- Their account is locked.
- Flag is set (i.e. change PW at next login) that NoMad cannot accommodate.
If all else fails, just like any other application follow the basic cookbook troubleshooting steps:
- Reinstall NoMad
- Reset any preferences (exempt and rescope configuration profiles)
- Reinstall macOS.
If the issue persist you are dealing with an issue with the users AD Object and your Identity Management Team needs to troubleshoot further.
