diff --git management/univention-directory-manager-modules/modules/univention/admin/uldap.py management/univention-directory-manager-modules/modules/univention/admin/uldap.py
index d9d5d3bc38..77cfec2839 100644
--- management/univention-directory-manager-modules/modules/univention/admin/uldap.py
+++ management/univention-directory-manager-modules/modules/univention/admin/uldap.py
@@ -191,7 +191,8 @@ def _err2str(err):
 	msgs = []
 	for iarg in err.args:
 		if isinstance(iarg, dict):
-			msg = ': '.join([str(m) for m in (iarg.get('desc'), iarg.get('info')) if m])
+			matched = 'matched %s' % (iarg['matched'],) if 'matched' in iarg else ''
+			msg = ': '.join([str(m) for m in (iarg.get('desc'), iarg.get('info'), matched) if m])
 		else:
 			msg = str(iarg)
 		if msg:
@@ -668,7 +669,7 @@ class access(object):
 		try:
 			return self.lo.search(filter, base, scope, attr, unique, required, timeout, sizelimit, serverctrls=serverctrls, response=response)
 		except ldap.NO_SUCH_OBJECT as msg:
-			raise univention.admin.uexceptions.noObject(_err2str(msg))
+			raise univention.admin.uexceptions.noObject('%s: %s' % (_err2str(msg), base))
 		except ldap.INAPPROPRIATE_MATCHING as msg:
 			raise univention.admin.uexceptions.insufficientInformation(_err2str(msg))
 		except (ldap.TIMEOUT, ldap.TIMELIMIT_EXCEEDED) as msg:
@@ -710,7 +711,7 @@ class access(object):
 		try:
 			return self.lo.searchDn(filter, base, scope, unique, required, timeout, sizelimit, serverctrls=serverctrls, response=response)
 		except ldap.NO_SUCH_OBJECT as msg:
-			raise univention.admin.uexceptions.noObject(_err2str(msg))
+			raise univention.admin.uexceptions.noObject('%s: %s' % (_err2str(msg), base))
 		except ldap.INAPPROPRIATE_MATCHING as msg:
 			raise univention.admin.uexceptions.insufficientInformation(_err2str(msg))
 		except (ldap.TIMEOUT, ldap.TIMELIMIT_EXCEEDED) as msg:
@@ -773,6 +774,9 @@ class access(object):
 			raise univention.admin.uexceptions.permissionDenied()
 		except ldap.INVALID_DN_SYNTAX as msg:
 			raise univention.admin.uexceptions.ldapError('%s: %s' % (_err2str(msg), dn), original_exception=msg)
+		except ldap.NO_SUCH_OBJECT as msg:
+			ud.debug(ud.LDAP, ud.ALL, 'add dn=%s err=%s' % (dn, msg))
+			raise univention.admin.uexceptions.ldapError('%s: %s' % (_err2str(msg), self.parentDn(dn)), original_exception=msg)
 		except ldap.LDAPError as msg:
 			ud.debug(ud.LDAP, ud.ALL, 'add dn=%s err=%s' % (dn, msg))
 			raise univention.admin.uexceptions.ldapError(_err2str(msg), original_exception=msg)
@@ -803,7 +807,7 @@ class access(object):
 			return self.lo.modify(dn, changes, serverctrls=serverctrls, response=response)
 		except ldap.NO_SUCH_OBJECT as msg:
 			ud.debug(ud.LDAP, ud.ALL, 'mod dn=%s err=%s' % (dn, msg))
-			raise univention.admin.uexceptions.noObject(dn)
+			raise univention.admin.uexceptions.noObject('%s: %s' % (_err2str(msg), dn))
 		except ldap.INSUFFICIENT_ACCESS as msg:
 			ud.debug(ud.LDAP, ud.ALL, 'mod dn=%s err=%s' % (dn, msg))
 			raise univention.admin.uexceptions.permissionDenied()
@@ -826,8 +830,8 @@ class access(object):
 		:type serverctrls: list[ldap.controls.LDAPControl]
 		:param dict response: An optional dictionary to receive the server controls of the result.
 		"""
-		if not move_childs == 0:
-			raise univention.admin.uexceptions.noObject(_("Moving children is not supported."))
+		if move_childs:
+			raise univention.admin.uexceptions.noObject('%s: %s' % (_("Moving children is not supported."), dn))
 		self._validateLicense()
 		if not self.allow_modify and not ignore_license:
 			ud.debug(ud.ADMIN, ud.WARN, 'move dn: %s' % dn)
@@ -837,7 +841,7 @@ class access(object):
 			return self.lo.rename(dn, newdn, serverctrls=serverctrls, response=response)
 		except ldap.NO_SUCH_OBJECT as msg:
 			ud.debug(ud.LDAP, ud.ALL, 'ren dn=%s err=%s' % (dn, msg))
-			raise univention.admin.uexceptions.noObject(dn)
+			raise univention.admin.uexceptions.noObject('%s: %s' % (_err2str(msg), dn, newdn))
 		except ldap.INSUFFICIENT_ACCESS as msg:
 			ud.debug(ud.LDAP, ud.ALL, 'ren dn=%s err=%s' % (dn, msg))
 			raise univention.admin.uexceptions.permissionDenied()
@@ -870,7 +874,7 @@ class access(object):
 			return self.lo.delete(dn)
 		except ldap.NO_SUCH_OBJECT as msg:
 			ud.debug(ud.LDAP, ud.ALL, 'del dn=%s err=%s' % (dn, msg))
-			raise univention.admin.uexceptions.noObject(dn)
+			raise univention.admin.uexceptions.noObject('%s: %s' % (_err2str(msg), dn))
 		except ldap.INSUFFICIENT_ACCESS as msg:
 			ud.debug(ud.LDAP, ud.ALL, 'del dn=%s err=%s' % (dn, msg))
 			raise univention.admin.uexceptions.permissionDenied()