--- a/management/univention-directory-manager-modules/modules/univention/admin/handlers/__init__.py	
+++ a/management/univention-directory-manager-modules/modules/univention/admin/handlers/__init__.py	
@@ -296,6 +296,9 @@ def items(self):
 	def create(self):
 		'''create object'''
 
+		if not univention.admin.modules.supports(self.module, 'add'):
+			raise univention.admin.uexceptions.invalidOperation('add')
+
 		if self.exists():
 			raise univention.admin.uexceptions.objectExists(self.dn)
 
@@ -307,6 +310,9 @@ def create(self):
 	def modify(self, modify_childs=1,ignore_license=0):
 		'''modify object'''
 
+		if not univention.admin.modules.supports(self.module, 'edit'):
+			raise univention.admin.uexceptions.invalidOperation('edit')
+
 		if not self.exists():
 			raise univention.admin.uexceptions.noObject(self.dn)
 
@@ -471,6 +477,9 @@ def move_subelements(self, olddn, newdn, subelements, ignore_license = False):
 	def remove(self, remove_childs=0):
 		'''remove object'''
 
+		if not univention.admin.modules.supports(self.module, 'remove'):
+			raise univention.admin.uexceptions.invalidOperation('remove')
+
 		if not self.dn or not self.lo.get(self.dn):
 			raise univention.admin.uexceptions.noObject(self.dn)