Assignment of a user to a group not possible, as the user is not an IYOPRO user (Error code 115).
The reason for this issue is that a user is member of the group in the directory service.
However this user is not a known IYOPRO user.
To resolve this issue make sure that all users specified as members in groups to be synchronized
are also IYOPRO users. Check that the users are also part of the configured source for the user
synchronization (configuration key LDAP_GROUPNAME).