Antwort auf Englisch um auch von englischsprachigen Usern verstanden zu werden.
Hello Michael,
From the log output above I cannot say why it happend, but OX has been removed during the upgrade:
Entfernen von univention-ox-meta-singleserver (9.0.7-11A~4.2.0.201801031550) ...
Entfernen von univention-ox (9.0.7-11A~4.2.0.201801031550) ...
That the OX service couldn’t be found is not a problem.
The upgrade broke because of an unrelated package dependency problem.
You can try to fix the current package installation problem by running
apt-get install -f
and then continue the upgrade by running univention-upgrade again.
The critical question is however if your user data in the uninstalled MySQL server is still there (should be) and will be picked up by MariaDB, when installed (should happen).
If you made a backup before upgrading, then I suggest to finish the upgrade and afterwards install the OX App again. Then check the data in the OX database (user accounts, contacts, calendar entries). If that database migration failed, you should save the logs, then restore the backup and verify that the installation is OK before trying to upgrade again.
Before everything, check the state of the LDAP schema, see How do I check, if the correct LDAP schemes are registered? in Update to OX App Suite 7.10.0 for UCS 4.3
Greetings
Daniel