diff --git a/services/univention-s4-connector/modules/univention/s4connector/__init__.py b/services/univention-s4-connector/modules/univention/s4connector/__init__.py
index 14e0ddd90c..a497aedc20 100644
--- a/services/univention-s4-connector/modules/univention/s4connector/__init__.py
+++ b/services/univention-s4-connector/modules/univention/s4connector/__init__.py
@@ -1434,9 +1434,11 @@ class ucs:
 							key = k
 							break
 					back_mapped_subobject = self._object_mapping(key, subobject_ucs, 'ucs')
+					result_s4 = self.lo_s4.lo.search_ext_s(univention.s4connector.s4.compatible_modstring(back_mapped_subobject['dn']), ldap.SCOPE_BASE, '(objectClass=*)', timeout=-1, sizelimit=0)
+					subobject_s4 = {'dn': result_s4[0][0], 'modtype': 'delete', 'attributes': result_s4[0][1]}
 					ud.debug(ud.LDAP, ud.WARN, "delete subobject: %s" % back_mapped_subobject['dn'])
 					if not self._ignore_object(key, back_mapped_subobject):
-						if not self.sync_to_ucs(key, subobject_ucs, back_mapped_subobject['dn'], object):
+						if not self.sync_to_ucs(key, subobject_ucs, back_mapped_subobject['dn'], subobject_s4):
 							try:
 								ud.debug(ud.LDAP, ud.WARN, "delete of subobject failed: %s" % result[0])
 							except (ldap.SERVER_DOWN, SystemExit):
@@ -1508,7 +1510,8 @@ class ucs:
 					return False
 
 		try:
-			guid_unicode = original_object.get('attributes').get('objectGUID')[0]
+			attributes = original_object.get('attributes')
+			guid_unicode = attributes.get('objectGUID')[0]
 			guid_blob = guid_unicode.encode('ISO-8859-1')  # to compensate for __object_from_element
 			guid = str(ndr_unpack(misc.GUID, guid_blob))