Since upgrading to UCS 5 I get warnings like this in the system diagnostic module:
Warning: Manual: Multiple members for UID 'Administrator' of group 'cn=Domain Admins,cn=groups,dc=top,dc=top1`
In the LDAP I can find entries as described here:
This should be fixed by running the script /usr/share/univention-directory-manager-tools/proof_uniqueMembers. Unfortunately this doesn’t work. The script doesn’t throws any error either.
In another post you’ve mentioned you are running one Admin account. If there are any errors with your permissions, wouldn’t it prevent the fix from working?
Addendum:
You seem to have lots of problems with your system. At the moment, you are playing whack-a-mole trying to fix small annoying issues but it looks like something else is broken. Take a backup of your system and check all things linked to LDAP.