diff --git a/src/caosdb/common/administration.py b/src/caosdb/common/administration.py
index 157518f82294257d7267b881e96d225ecce4304f..1f39bead8d8f0933119d87a240e39e2a65a71fb0 100644
--- a/src/caosdb/common/administration.py
+++ b/src/caosdb/common/administration.py
@@ -28,8 +28,9 @@ from lxml import etree
 
 from caosdb.common.utils import xml2str
 from caosdb.connection.connection import get_connection
-from caosdb.exceptions import (AuthorizationException, ClientErrorException,
-                               EntityDoesNotExistError)
+from caosdb.exceptions import (ClientErrorException,
+                               HTTPAuthorizationException,
+                               ResourceNotFoundException)
 
 
 def set_server_property(key, value):
@@ -104,10 +105,10 @@ def _retrieve_user(name, realm=None, **kwargs):
     con = get_connection()
     try:
         return con._http_request(method="GET", path="User/" + (realm + "/" + name if realm is not None else name), **kwargs).read()
-    except AuthorizationException as e:
+    except HTTPAuthorizationException as e:
         e.msg = "You are not permitted to retrieve this user."
         raise
-    except EntityDoesNotExistError as e:
+    except ResourceNotFoundException as e:
         e.msg = "User does not exist."
         raise
 
@@ -116,10 +117,10 @@ def _delete_user(name, **kwargs):
     con = get_connection()
     try:
         return con._http_request(method="DELETE", path="User/" + name, **kwargs).read()
-    except AuthorizationException as e:
+    except HTTPAuthorizationException as e:
         e.msg = "You are not permitted to delete this user."
         raise
-    except EntityDoesNotExistError as e:
+    except ResourceNotFoundException as e:
         e.msg = "User does not exist."
         raise
 
@@ -142,10 +143,10 @@ def _update_user(name, realm=None, password=None, status=None,
         params["entity"] = str(entity)
     try:
         return con.put_form_data(entity_uri_segment="User/" + (realm + "/" + name if realm is not None else name), params=params, **kwargs).read()
-    except EntityDoesNotExistError as e:
+    except ResourceNotFoundException as e:
         e.msg = "User does not exist."
         raise
-    except AuthorizationException as e:
+    except HTTPAuthorizationException as e:
         e.msg = "You are not permitted to update this user."
         raise
     except ClientErrorException as e:
@@ -171,7 +172,7 @@ def _insert_user(name, password=None, status=None, email=None, entity=None, **kw
         params["entity"] = entity
     try:
         return con.post_form_data(entity_uri_segment="User", params=params, **kwargs).read()
-    except AuthorizationException as e:
+    except HTTPAuthorizationException as e:
         e.msg = "You are not permitted to insert a new user."
         raise e
     except ClientErrorException as e:
@@ -187,7 +188,7 @@ def _insert_role(name, description, **kwargs):
     con = get_connection()
     try:
         return con.post_form_data(entity_uri_segment="Role", params={"role_name": name, "role_description": description}, **kwargs).read()
-    except AuthorizationException as e:
+    except HTTPAuthorizationException as e:
         e.msg = "You are not permitted to insert a new role."
         raise
     except ClientErrorException as e:
@@ -200,10 +201,10 @@ def _update_role(name, description, **kwargs):
     con = get_connection()
     try:
         return con.put_form_data(entity_uri_segment="Role/" + name, params={"role_description": description}, **kwargs).read()
-    except AuthorizationException as e:
+    except HTTPAuthorizationException as e:
         e.msg = "You are not permitted to update this role."
         raise
-    except EntityDoesNotExistError as e:
+    except ResourceNotFoundException as e:
         e.msg = "Role does not exist."
         raise
 
@@ -212,10 +213,10 @@ def _retrieve_role(name, **kwargs):
     con = get_connection()
     try:
         return con._http_request(method="GET", path="Role/" + name, **kwargs).read()
-    except AuthorizationException as e:
+    except HTTPAuthorizationException as e:
         e.msg = "You are not permitted to retrieve this role."
         raise
-    except EntityDoesNotExistError as e:
+    except ResourceNotFoundException as e:
         e.msg = "Role does not exist."
         raise
 
@@ -224,10 +225,10 @@ def _delete_role(name, **kwargs):
     con = get_connection()
     try:
         return con._http_request(method="DELETE", path="Role/" + name, **kwargs).read()
-    except AuthorizationException as e:
+    except HTTPAuthorizationException as e:
         e.msg = "You are not permitted to delete this role."
         raise
-    except EntityDoesNotExistError as e:
+    except ResourceNotFoundException as e:
         e.msg = "Role does not exist."
         raise
 
@@ -241,11 +242,12 @@ def _set_roles(username, roles, realm=None, **kwargs):
     body = xml2str(xml)
     con = get_connection()
     try:
-        body = con._http_request(method="PUT", path="UserRoles/" + (realm + "/" + username if realm is not None else username), body=body, **kwargs).read()
-    except AuthorizationException as e:
+        body = con._http_request(method="PUT", path="UserRoles/" + (realm + "/" +
+                                                                    username if realm is not None else username), body=body, **kwargs).read()
+    except HTTPAuthorizationException as e:
         e.msg = "You are not permitted to set this user's roles."
         raise
-    except EntityDoesNotExistError as e:
+    except ResourceNotFoundException as e:
         e.msg = "User does not exist."
         raise
     except ClientErrorException as e:
@@ -264,11 +266,12 @@ def _set_roles(username, roles, realm=None, **kwargs):
 def _get_roles(username, realm=None, **kwargs):
     con = get_connection()
     try:
-        body = con._http_request(method="GET", path="UserRoles/" + (realm + "/" + username if realm is not None else username), **kwargs).read()
-    except AuthorizationException as e:
+        body = con._http_request(method="GET", path="UserRoles/" + (
+            realm + "/" + username if realm is not None else username), **kwargs).read()
+    except HTTPAuthorizationException as e:
         e.msg = "You are not permitted to retrieve this user's roles."
         raise
-    except EntityDoesNotExistError as e:
+    except ResourceNotFoundException as e:
         e.msg = "User does not exist."
         raise
     ret = set()
@@ -308,10 +311,10 @@ Returns
     con = get_connection()
     try:
         return con._http_request(method="PUT", path="PermissionRules/" + role, body=body, **kwargs).read()
-    except AuthorizationException as e:
+    except HTTPAuthorizationException as e:
         e.msg = "You are not permitted to set this role's permissions."
         raise
-    except EntityDoesNotExistError as e:
+    except ResourceNotFoundException as e:
         e.msg = "Role does not exist."
         raise
 
@@ -320,10 +323,10 @@ def _get_permissions(role, **kwargs):
     con = get_connection()
     try:
         return PermissionRule._parse_body(con._http_request(method="GET", path="PermissionRules/" + role, **kwargs).read())
-    except AuthorizationException as e:
+    except HTTPAuthorizationException as e:
         e.msg = "You are not permitted to retrieve this role's permissions."
         raise
-    except EntityDoesNotExistError as e:
+    except ResourceNotFoundException as e:
         e.msg = "Role does not exist."
         raise