When EnableUserDB is set to 1 in server configuration file and the NoMachine Enterprise Desktop on Windows10 is upgraded from v. 6.12.3 to v. 7.4.1,a mismtach in the username's uppercase/lowercase between NX users db and the system leads to failed logins.

The nxserver commands to add and delete the user return ambiguous results, e.g.

nxserver  --useradd noMachine_user
NX> 801 User 'noMachine_user' uses system authentication.
NX> 313 User 'noMachine_user' is already in the NX user DB.

nxserver  --userdel noMachine_user
NX> 900 User: noMachine_user not in NX user DB.