I solved the issue by extending the pattern for type 'id_string' in keystone/common/validation/parameter_types.py. Will create a new bug for this problem because it is not really related to a not working multi-domain setup with LDAP identity.
I solved the issue by extending the pattern for type 'id_string' in keystone/ common/ validation/ parameter_ types.py. Will create a new bug for this problem because it is not really related to a not working multi-domain setup with LDAP identity.