diff --git a/doc/source/command-objects/group.rst b/doc/source/command-objects/group.rst
index 3e7e806f17..6c385058b0 100644
--- a/doc/source/command-objects/group.rst
+++ b/doc/source/command-objects/group.rst
@@ -151,7 +151,6 @@ Set group properties
 
     os group set
         [--name <name>]
-        [--domain <domain>]
         [--description <description>]
         <group>
 
@@ -159,10 +158,6 @@ Set group properties
 
     New group name
 
-.. option:: --domain <domain>
-
-    New domain to contain <group> (name or ID)
-
 .. option:: --description <description>
 
     New group description
diff --git a/doc/source/command-objects/user.rst b/doc/source/command-objects/user.rst
index 9c81a40326..79807b23bf 100644
--- a/doc/source/command-objects/user.rst
+++ b/doc/source/command-objects/user.rst
@@ -136,7 +136,6 @@ Set user properties
 
     os user set
         [--name <name>]
-        [--domain <domain>]
         [--project <project>]
         [--password <password>]
         [--email <email-address>]
@@ -148,12 +147,6 @@ Set user properties
 
     Set user name
 
-.. option:: --domain <domain>
-
-    Set default domain (name or ID)
-
-    .. versionadded:: 3
-
 .. option:: --project <project>
 
     Set default project (name or ID)
diff --git a/openstackclient/identity/v3/group.py b/openstackclient/identity/v3/group.py
index 94e101f31a..a2afecb9a7 100644
--- a/openstackclient/identity/v3/group.py
+++ b/openstackclient/identity/v3/group.py
@@ -314,10 +314,6 @@ class SetGroup(command.Command):
             '--name',
             metavar='<name>',
             help='New group name')
-        parser.add_argument(
-            '--domain',
-            metavar='<domain>',
-            help='New domain to contain <group> (name or ID)')
         parser.add_argument(
             '--description',
             metavar='<description>',
@@ -333,9 +329,7 @@ class SetGroup(command.Command):
             kwargs['name'] = parsed_args.name
         if parsed_args.description:
             kwargs['description'] = parsed_args.description
-        if parsed_args.domain:
-            kwargs['domain'] = common.find_domain(identity_client,
-                                                  parsed_args.domain).id
+
         if not len(kwargs):
             sys.stderr.write("Group not updated, no arguments present")
             return
diff --git a/openstackclient/identity/v3/user.py b/openstackclient/identity/v3/user.py
index 7b847eedb8..0a154f6405 100644
--- a/openstackclient/identity/v3/user.py
+++ b/openstackclient/identity/v3/user.py
@@ -299,11 +299,6 @@ class SetUser(command.Command):
             metavar='<name>',
             help='Set user name',
         )
-        parser.add_argument(
-            '--domain',
-            metavar='<domain>',
-            help='Set default domain (name or ID)',
-        )
         parser.add_argument(
             '--project',
             metavar='<project>',
@@ -354,7 +349,6 @@ class SetUser(command.Command):
                 and not parsed_args.name
                 and not parsed_args.password
                 and not parsed_args.email
-                and not parsed_args.domain
                 and not parsed_args.project
                 and not parsed_args.description
                 and not parsed_args.enable
@@ -379,9 +373,6 @@ class SetUser(command.Command):
             project_id = utils.find_resource(
                 identity_client.projects, parsed_args.project).id
             kwargs['project'] = project_id
-        if parsed_args.domain:
-            kwargs['domain'] = common.find_domain(identity_client,
-                                                  parsed_args.domain).id
         kwargs['enabled'] = user.enabled
         if parsed_args.enable:
             kwargs['enabled'] = True
diff --git a/openstackclient/tests/identity/v3/test_user.py b/openstackclient/tests/identity/v3/test_user.py
index 8d0b6d3106..ab6e6bce2e 100644
--- a/openstackclient/tests/identity/v3/test_user.py
+++ b/openstackclient/tests/identity/v3/test_user.py
@@ -696,12 +696,6 @@ class TestUserSet(TestUser):
     def setUp(self):
         super(TestUserSet, self).setUp()
 
-        self.domains_mock.get.return_value = fakes.FakeResource(
-            None,
-            copy.deepcopy(identity_fakes.DOMAIN),
-            loaded=True,
-        )
-
         self.projects_mock.get.return_value = fakes.FakeResource(
             None,
             copy.deepcopy(identity_fakes.PROJECT),
@@ -730,7 +724,6 @@ class TestUserSet(TestUser):
             ('name', None),
             ('password', None),
             ('email', None),
-            ('domain', None),
             ('project', None),
             ('enable', False),
             ('disable', False),
@@ -750,7 +743,6 @@ class TestUserSet(TestUser):
             ('name', 'qwerty'),
             ('password', None),
             ('email', None),
-            ('domain', None),
             ('project', None),
             ('enable', False),
             ('disable', False),
@@ -783,7 +775,6 @@ class TestUserSet(TestUser):
             ('password', 'secret'),
             ('password_prompt', False),
             ('email', None),
-            ('domain', None),
             ('project', None),
             ('enable', False),
             ('disable', False),
@@ -816,7 +807,6 @@ class TestUserSet(TestUser):
             ('password', None),
             ('password_prompt', True),
             ('email', None),
-            ('domain', None),
             ('project', None),
             ('enable', False),
             ('disable', False),
@@ -851,7 +841,6 @@ class TestUserSet(TestUser):
             ('name', None),
             ('password', None),
             ('email', 'barney@example.com'),
-            ('domain', None),
             ('project', None),
             ('enable', False),
             ('disable', False),
@@ -874,38 +863,6 @@ class TestUserSet(TestUser):
             **kwargs
         )
 
-    def test_user_set_domain(self):
-        arglist = [
-            '--domain', identity_fakes.domain_id,
-            identity_fakes.user_name,
-        ]
-        verifylist = [
-            ('name', None),
-            ('password', None),
-            ('email', None),
-            ('domain', identity_fakes.domain_id),
-            ('project', None),
-            ('enable', False),
-            ('disable', False),
-            ('user', identity_fakes.user_name),
-        ]
-        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
-
-        # DisplayCommandBase.take_action() returns two tuples
-        self.cmd.take_action(parsed_args)
-
-        # Set expected values
-        kwargs = {
-            'enabled': True,
-            'domain': identity_fakes.domain_id,
-        }
-        # UserManager.update(user, name=, domain=, project=, password=,
-        #     email=, description=, enabled=, default_project=)
-        self.users_mock.update.assert_called_with(
-            identity_fakes.user_id,
-            **kwargs
-        )
-
     def test_user_set_project(self):
         arglist = [
             '--project', identity_fakes.project_id,
@@ -915,7 +872,6 @@ class TestUserSet(TestUser):
             ('name', None),
             ('password', None),
             ('email', None),
-            ('domain', None),
             ('project', identity_fakes.project_id),
             ('enable', False),
             ('disable', False),
@@ -947,7 +903,6 @@ class TestUserSet(TestUser):
             ('name', None),
             ('password', None),
             ('email', None),
-            ('domain', None),
             ('project', None),
             ('enable', True),
             ('disable', False),
@@ -978,7 +933,6 @@ class TestUserSet(TestUser):
             ('name', None),
             ('password', None),
             ('email', None),
-            ('domain', None),
             ('project', None),
             ('enable', False),
             ('disable', True),