In UCS, when a user is created with Locked Login applied (a set PasswordRecoveryEmail and pwdChangeNextLogin=1) the listener module selfservice-invitation.py in cooperation with a daemon will send an invitation email to the user.
In UCS@school this automatism is most likely not desired.
The self service invitation is controlled by the UCR-variable umc/self-service/invitation/enabled, which is set to false by default on UCS@school systems. This feature is controlled by the UDM policy send_self_service_invitation.
DN="cn=send_self_service_invitation,cn=policies,$(ucr get ldap/base)" udm policies/registry modify --dn "$DN" --set registry="umc/self-service/send_self_service_invitation/enabled true"
If you decide to create another policy at this position with the same name, it will not be modified. Policies with different names, which set the same values are ignored.