Yesterday, a fix was released for the Kopano Core App, which should eliminate problems when updating to UCS 5. We saw that many kopano-* and univention-* packages were removed during the update. The issue occured when customers with a Kopano subscription had activated the external Kopano repositories in the App settings.
This should not happen anymore since yesterday. While i do not have the time to look into this thread’s issues individually, i suggest to retry the update.