For SLE 12 SP5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:ha-clustering:sap-deployments:builddeps/SLE_12_SP5/network:ha-clustering:sap-deployments:builddeps.repo
zypper refresh
zypper install sysuser-shadow
For SLE 12 SP4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:ha-clustering:sap-deployments:builddeps/SLE_12_SP4/network:ha-clustering:sap-deployments:builddeps.repo
zypper refresh
zypper install sysuser-shadow
For SLE 12 SP3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:ha-clustering:sap-deployments:builddeps/SLE_12_SP3/network:ha-clustering:sap-deployments:builddeps.repo
zypper refresh
zypper install sysuser-shadow