Using an account with 'sudo' privileges, edit the sssd.conf file located at the path above.
To give a user access to log in, add their NetID to the 'simple_allow_users' line. If this line does not exist, you can create it. The list of users must be comma-separated.
Restart the sssd service: sudo systemctl restart sssd.service OR reboot the system.
2) Provide 'sudo' (admin) privileges
Use with caution. This will enable the user to make system-wide changes and should be reserved for users who have familiarity with a Linux command-line environment.
"sudo usermod -aG sudo <netid>"
Using an account with 'sudo' privileges, run the above command, substituting in the user's netid