Install sssd-krb5 by entering the following commands in the terminal:
sudo apt update sudo apt install sssd-krb5
Description:
System Security Services Daemon -- Kerberos back end
Provides the Kerberos back end that the SSSD can utilize authenticate against a Kerberos server.
Homepage: https://pagure.io/SSSD/sssd/
Version: 1.16.1-1ubuntu1
Section: utils