abcd@opensuse:~> LANG=c zypper se -i --requires "group(ntadmin)"
Loading repository data...
Reading installed packages...

S | Name | Summary                         | Type
--+------+---------------------------------+--------
i | cups | The Common UNIX Printing System | package

abcd@opensuse:~> LANG=c zypper se --provides "group(ntadmin)"
Loading repository data...
Reading installed packages...

S | Name  | Summary                                           | Type
--+-------+---------------------------------------------------+--------
i | samba | A SMB/CIFS File, Print, and Authentication Server | package


I had "ntadmin:x:71:" in /etc/group before the upgrade, probably created by
cups.
It seems exaggerated to install samba plus a gazillion of dependencies only to
fulfill this dependency.