samba-winbind from spins:invis:stable:samba46 project
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Add repository and install manually
For openSUSE Leap 42.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/spins:invis:stable:samba46/openSUSE_Leap_42.3/spins:invis:stable:samba46.repo zypper refresh zypper install samba-winbind