diff --git a/doc/source/command-objects/user.rst b/doc/source/command-objects/user.rst
index 7e0ee21b0f..632d0e2566 100644
--- a/doc/source/command-objects/user.rst
+++ b/doc/source/command-objects/user.rst
@@ -153,6 +153,13 @@ Set user properties
 
     Set user name
 
+.. option:: --domain <domain>
+
+    Domain the user belongs to (name or ID).
+    This can be used in case collisions between user names exist.
+
+    .. versionadded:: 3
+
 .. option:: --project <project>
 
     Set default project (name or ID)
diff --git a/openstackclient/identity/v3/user.py b/openstackclient/identity/v3/user.py
index 19a4c29875..9c289a6d8a 100644
--- a/openstackclient/identity/v3/user.py
+++ b/openstackclient/identity/v3/user.py
@@ -301,6 +301,12 @@ class SetUser(command.Command):
             metavar='<name>',
             help=_('Set user name'),
         )
+        parser.add_argument(
+            '--domain',
+            metavar='<domain>',
+            help=_('Domain the user belongs to (name or ID). This can be '
+                   'used in case collisions between user names exist.'),
+        )
         parser.add_argument(
             '--project',
             metavar='<project>',
@@ -351,10 +357,19 @@ class SetUser(command.Command):
             LOG.warning(_("No password was supplied, authentication will fail "
                           "when a user does not have a password."))
 
-        user = utils.find_resource(
-            identity_client.users,
-            parsed_args.user,
-        )
+        user_str = common._get_token_resource(identity_client, 'user',
+                                              parsed_args.user)
+        if parsed_args.domain:
+            domain = common.find_domain(identity_client, parsed_args.domain)
+            user = utils.find_resource(identity_client.users,
+                                       user_str,
+                                       domain_id=domain.id)
+        else:
+            user = utils.find_resource(
+                identity_client.users,
+                parsed_args.user,
+            )
+
         kwargs = {}
         if parsed_args.name:
             kwargs['name'] = parsed_args.name
diff --git a/openstackclient/tests/unit/identity/v3/test_user.py b/openstackclient/tests/unit/identity/v3/test_user.py
index 3c1f49a680..2ce66e94a2 100644
--- a/openstackclient/tests/unit/identity/v3/test_user.py
+++ b/openstackclient/tests/unit/identity/v3/test_user.py
@@ -684,9 +684,14 @@ class TestUserList(TestUser):
 class TestUserSet(TestUser):
 
     project = identity_fakes.FakeProject.create_one_project()
+    domain = identity_fakes.FakeDomain.create_one_domain()
     user = identity_fakes.FakeUser.create_one_user(
         attrs={'default_project_id': project.id}
     )
+    user2 = identity_fakes.FakeUser.create_one_user(
+        attrs={'default_project_id': project.id,
+               'domain_id': domain.id}
+    )
 
     def setUp(self):
         super(TestUserSet, self).setUp()
@@ -748,6 +753,37 @@ class TestUserSet(TestUser):
         )
         self.assertIsNone(result)
 
+    def test_user_set_specify_domain(self):
+        arglist = [
+            '--name', 'qwerty',
+            '--domain', self.domain.id,
+            self.user2.name
+        ]
+        verifylist = [
+            ('name', 'qwerty'),
+            ('password', None),
+            ('domain', self.domain.id),
+            ('email', None),
+            ('project', None),
+            ('enable', False),
+            ('disable', False),
+            ('user', self.user2.name),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        result = self.cmd.take_action(parsed_args)
+
+        kwargs = {
+            'enabled': True,
+            'name': 'qwerty'
+        }
+
+        self.users_mock.update.assert_called_with(
+            self.user.id,
+            **kwargs
+        )
+        self.assertIsNone(result)
+
     def test_user_set_password(self):
         arglist = [
             '--password', 'secret',
diff --git a/releasenotes/notes/bug-1658147-9de9ae222f9db9ae.yaml b/releasenotes/notes/bug-1658147-9de9ae222f9db9ae.yaml
new file mode 100644
index 0000000000..f46305abfa
--- /dev/null
+++ b/releasenotes/notes/bug-1658147-9de9ae222f9db9ae.yaml
@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Add ``--domain`` options to the ``user set`` command.
+    Allows specification of domain context when changing users.
+    [Bug `1658147 <https://bugs.launchpad.net/bugs/1658147>`_]