To set up True SSO for Ubuntu/Debian desktops, first integrate the base virtual machine with an Active Directory domain using the Samba and Winbind domain-join solutions. Then install the required libraries and root Certificate Authority (CA) certificate before installing Horizon Agent.

Note: Alternatively, you can configure True SSO using the SSSD domain-join solution as described in Configure True SSO with SSSD on Ubuntu/Debian Desktops.