✨(all) allow forcing SSO display name for authenticated users

Add a new setting that controls whether an authenticated user can
rename or modify their display name, or if they must use the one
returned by the SSO.

When the setting is disabled, only anonymous users can set a display
name freely; authenticated users always use their SSO display name.

Requested by many self-hosters.

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to
 
 - ✨(backend) allow searching the recording admin table by owner email
 - ✨(frontend) add participant color gradient when camera is off #1490
+- ✨(all) allow forcing SSO display name for authenticated users
 
 ### Changed
 

src/backend/core/api/__init__.py

@@ -68,6 +68,9 @@ def get_frontend_configuration(request):
             "enable_firefox_proxy_workaround": settings.LIVEKIT_ENABLE_FIREFOX_PROXY_WORKAROUND,
             "default_sources": settings.LIVEKIT_DEFAULT_SOURCES,
         },
+        "authenticated_users_can_edit_display_name": (
+            settings.AUTHENTICATED_PARTICIPANTS_CAN_EDIT_DISPLAY_NAME
+        ),
     }
     frontend_configuration.update(settings.FRONTEND_CONFIGURATION)
     return Response(frontend_configuration)

src/backend/core/tests/test_utils.py

@@ -7,6 +7,7 @@ import json
 from unittest import mock
 
 from django.conf import settings
+from django.contrib.auth.models import AnonymousUser
 
 import jwt
 import pytest
@@ -66,6 +67,46 @@ def test_generate_token_explicit_username_overrides_default():
     assert claims["name"] == "Custom Name"
 
 
+def test_authenticated_username_ignored_when_editing_disabled(settings):
+    """With editing disabled, an authenticated user's username is ignored."""
+    settings.AUTHENTICATED_PARTICIPANTS_CAN_EDIT_DISPLAY_NAME = False
+    user = UserFactory(full_name="Jane Doe")
+    token = generate_token(room="my-room", user=user, username="Custom Name")
+    claims = decode_token(token)
+    assert claims["name"] == "Jane Doe"
+
+
+def test_authenticated_default_name_unaffected_when_editing_disabled(settings):
+    """Disabling editing doesn't disturb the default full-name path."""
+    settings.AUTHENTICATED_PARTICIPANTS_CAN_EDIT_DISPLAY_NAME = False
+    user = UserFactory(full_name="Jane Doe")
+    token = generate_token(room="my-room", user=user)
+    claims = decode_token(token)
+    assert claims["name"] == "Jane Doe"
+
+
+def test_anonymous_uses_username_when_provided():
+    """An anonymous user's provided username is used as the display name."""
+    token = generate_token(room="my-room", user=AnonymousUser(), username="Guest42")
+    claims = decode_token(token)
+    assert claims["name"] == "Guest42"
+
+
+def test_anonymous_username_used_even_when_editing_disabled(settings):
+    """The setting governs authenticated users only; anonymous can still set a name."""
+    settings.AUTHENTICATED_PARTICIPANTS_CAN_EDIT_DISPLAY_NAME = False
+    token = generate_token(room="my-room", user=AnonymousUser(), username="Guest42")
+    claims = decode_token(token)
+    assert claims["name"] == "Guest42"
+
+
+def test_anonymous_falls_back_to_anonymous_label():
+    """With no username, an anonymous user is labelled 'Anonymous'."""
+    token = generate_token(room="my-room", user=AnonymousUser())
+    claims = decode_token(token)
+    assert claims["name"] == "Anonymous"
+
+
 @mock.patch("asyncio.get_running_loop")
 @mock.patch("core.utils.LiveKitAPI")
 def test_create_livekit_client_ssl_enabled(

src/backend/core/utils.py

@@ -114,6 +114,11 @@ def generate_token(
     if color is None:
         color = generate_color(identity)
 
+    can_edit = (
+        settings.AUTHENTICATED_PARTICIPANTS_CAN_EDIT_DISPLAY_NAME or user.is_anonymous
+    )
+    display_name = (username or default_username) if can_edit else default_username
+
     token = (
         AccessToken(
             api_key=settings.LIVEKIT_CONFIGURATION["api_key"],
@@ -121,7 +126,7 @@ def generate_token(
         )
         .with_grants(video_grants)
         .with_identity(identity)
-        .with_name(username or default_username)
+        .with_name(display_name)
         .with_attributes(
             {"color": color, "room_admin": "true" if is_admin_or_owner else "false"}
         )

src/backend/meet/settings.py

@@ -671,6 +671,11 @@ class Base(Configuration):
         environ_name="PARTICIPANT_FORBIDDEN_PERMISSION_FIELDS",
         environ_prefix=None,
     )
+    AUTHENTICATED_PARTICIPANTS_CAN_EDIT_DISPLAY_NAME = values.BooleanValue(
+        True,
+        environ_name="AUTHENTICATED_PARTICIPANTS_CAN_EDIT_DISPLAY_NAME",
+        environ_prefix=None,
+    )
 
     # Recording settings
     RECORDING_ENABLE = values.BooleanValue(

src/frontend/src/api/useConfig.ts

@@ -58,6 +58,7 @@ export interface ApiConfig {
   transcription_destination?: string
   max_participants_for_sound: number
   auto_mute_on_join_threshold: number
+  authenticated_users_can_edit_display_name: boolean
 }
 
 const fetchConfig = (): Promise<ApiConfig> => {

src/frontend/src/features/rooms/components/Join.tsx

@@ -51,6 +51,8 @@ import { saveUsername, userStore } from '@/stores/user'
 
 import { useCannotUseDevice } from '../livekit/hooks/useCannotUseDevice'
 import { useSnapshot } from 'valtio'
+import { useUser } from '@/features/auth/api/useUser'
+import { useConfig } from '@/api/useConfig'
 
 const onError = (e: Error) => console.error('ERROR', e)
 
@@ -115,6 +117,9 @@ export const Join = ({
 }) => {
   const { t } = useTranslation('rooms', { keyPrefix: 'join' })
 
+  const { data: configData } = useConfig()
+  const { isLoggedIn } = useUser()
+
   const {
     audioEnabled,
     videoEnabled,
@@ -449,20 +454,23 @@ export const Join = ({
               <H lvl={1} margin="sm" centered>
                 {t('heading')}
               </H>
-              <Field
-                type="text"
-                onChange={saveUsername}
-                label={t('usernameLabel')}
-                id="input-name"
-                defaultValue={username}
-                validate={(value) => !value && t('errors.usernameEmpty')}
-                wrapperProps={{
-                  noMargin: true,
-                  fullWidth: true,
-                }}
-                autoComplete="name"
-                maxLength={50}
-              />
+              {(!isLoggedIn ||
+                configData?.authenticated_users_can_edit_display_name) && (
+                <Field
+                  type="text"
+                  onChange={saveUsername}
+                  label={t('usernameLabel')}
+                  id="input-name"
+                  defaultValue={username}
+                  validate={(value) => !value && t('errors.usernameEmpty')}
+                  wrapperProps={{
+                    noMargin: true,
+                    fullWidth: true,
+                  }}
+                  autoComplete="name"
+                  maxLength={50}
+                />
+              )}
             </VStack>
           </Form>
         )

src/frontend/src/features/settings/components/tabs/AccountTab.tsx

@@ -10,6 +10,7 @@ import { LoginButton } from '@/components/LoginButton'
 import { useRenameParticipant } from '@/features/rooms/api/renameParticipant'
 import { saveUsername } from '@/stores/user'
 import { logout } from '@/features/auth/utils/logout'
+import { useConfig } from '@/api/useConfig'
 
 export type AccountTabProps = Pick<DialogProps, 'onOpenChange'> &
   Pick<TabPanelProps, 'id'>
@@ -17,6 +18,7 @@ export type AccountTabProps = Pick<DialogProps, 'onOpenChange'> &
 export const AccountTab = ({ id, onOpenChange }: AccountTabProps) => {
   const { t } = useTranslation('settings')
   const room = useRoomContext()
+  const { data } = useConfig()
   const { user, isLoggedIn } = useUser()
 
   const { renameParticipant } = useRenameParticipant()
@@ -45,15 +47,17 @@ export const AccountTab = ({ id, onOpenChange }: AccountTabProps) => {
   return (
     <TabPanel padding={'md'} flex id={id}>
       <H lvl={2}>{t('account.heading')}</H>
-      <Field
-        type="text"
-        label={t('account.nameLabel')}
-        value={name}
-        onChange={setName}
-        validate={(value) => {
-          return !value ? <p>{t('account.nameError')}</p> : null
-        }}
-      />
+      {(!isLoggedIn || data?.authenticated_users_can_edit_display_name) && (
+        <Field
+          type="text"
+          label={t('account.nameLabel')}
+          value={name}
+          onChange={setName}
+          validate={(value) => {
+            return !value ? <p>{t('account.nameError')}</p> : null
+          }}
+        />
+      )}
       <H lvl={2}>{t('account.authentication')}</H>
       {isLoggedIn ? (
         <>