Error "primaryGroupWithoutSamba" during synchronization with Active Directory

Hi everybody,

being new to Univention, we have just set up our first UCS. It is connected to an existing Active Directory domain. We are experiencing a problem with user synchronization. Only a few users appear in Univention. The following error message appears for the ones that are not snyced.

univention.admin.uexceptions.primaryGroupWithoutSamba: Need a primary group with samba option to create a user with samba option: cn=Domain Users,cn=users,dc=company,dc=local.

All users’ primary group is “Domänen-Benutzer” (German). The English version mentioned in the error message (“Domain Users”) does not exist. Is there any solution to this problem? I have found a similar topic in German with no solution so far: https://help.univention.com/t/synchronisation-von-nutzern-mit-windows-ad-schlagt-nach-ucs-update-fehl/23141

All the best
J.P.