diff --git a/packages/core/admin/admin/src/components/AuthenticatedApp/index.js b/packages/core/admin/admin/src/components/AuthenticatedApp/index.js
index e1a99b58d7..53507f3753 100644
--- a/packages/core/admin/admin/src/components/AuthenticatedApp/index.js
+++ b/packages/core/admin/admin/src/components/AuthenticatedApp/index.js
@@ -1,7 +1,8 @@
-import React, { useMemo } from 'react';
+import React, { useMemo, useState } from 'react';
 //  TODO: DS add loader
-import { LoadingIndicatorPage, AppInfosContext } from '@strapi/helper-plugin';
+import { auth, LoadingIndicatorPage, AppInfosContext } from '@strapi/helper-plugin';
 import { useQueries } from 'react-query';
+import get from 'lodash/get';
 import packageJSON from '../../../../package.json';
 import { useConfigurations } from '../../hooks';
 import PluginsInitializer from '../PluginsInitializer';
@@ -12,6 +13,9 @@ import checkLatestStrapiVersion from './utils/checkLatestStrapiVersion';
 const strapiVersion = packageJSON.version;
 
 const AuthenticatedApp = () => {
+  const userInfo = auth.getUserInfo();
+  const userName = get(userInfo, 'username', `${userInfo.firstname} ${userInfo.lastname}`);
+  const [userDisplayName, setUserDisplayName] = useState(userName);
   const { showReleaseNotification } = useConfigurations();
   const [
     { data: appInfos, status },
@@ -54,7 +58,13 @@ const AuthenticatedApp = () => {
 
   return (
     <AppInfosContext.Provider
-      value={{ ...appInfos, latestStrapiReleaseTag: tag_name, shouldUpdateStrapi }}
+      value={{
+        ...appInfos,
+        latestStrapiReleaseTag: tag_name,
+        setUserDisplayName,
+        shouldUpdateStrapi,
+        userDisplayName,
+      }}
     >
       <RBACProvider permissions={permissions} refetchPermissions={refetch}>
         <PluginsInitializer />
diff --git a/packages/core/admin/admin/src/components/AuthenticatedApp/tests/index.test.js b/packages/core/admin/admin/src/components/AuthenticatedApp/tests/index.test.js
index 243716ab47..ac926dc340 100644
--- a/packages/core/admin/admin/src/components/AuthenticatedApp/tests/index.test.js
+++ b/packages/core/admin/admin/src/components/AuthenticatedApp/tests/index.test.js
@@ -9,6 +9,11 @@ import AuthenticatedApp from '..';
 
 const strapiVersion = packageJSON.version;
 
+jest.mock('@strapi/helper-plugin', () => ({
+  ...jest.requireActual('@strapi/helper-plugin'),
+  auth: { getUserInfo: () => ({ firstname: 'kai', lastname: 'doe' }) },
+}));
+
 jest.mock('../utils/api', () => ({
   fetchStrapiLatestRelease: jest.fn(),
   fetchAppInfo: jest.fn(),
diff --git a/packages/core/admin/admin/src/components/LeftMenu/index.js b/packages/core/admin/admin/src/components/LeftMenu/index.js
index f96797d1ea..928358008f 100644
--- a/packages/core/admin/admin/src/components/LeftMenu/index.js
+++ b/packages/core/admin/admin/src/components/LeftMenu/index.js
@@ -2,7 +2,7 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import { FormattedMessage } from 'react-intl';
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
-import get from 'lodash/get';
+
 import { useHistory } from 'react-router-dom';
 import {
   MainNav,
@@ -16,23 +16,14 @@ import {
   Button,
 } from '@strapi/parts';
 import ContentIcon from '@strapi/icons/ContentIcon';
-import { auth, usePersistentState } from '@strapi/helper-plugin';
+import { auth, usePersistentState, useAppInfos } from '@strapi/helper-plugin';
 import useConfigurations from '../../hooks/useConfigurations';
 
 const LeftMenu = ({ generalSectionLinks, pluginsSectionLinks }) => {
   const { menuLogo } = useConfigurations();
   const { push } = useHistory();
   const [condensed, setCondensed] = usePersistentState('navbar-condensed', false);
-
-  const userInfo = auth.getUserInfo();
-
-  let displayName;
-
-  if (userInfo && userInfo.firstname && userInfo.lastname) {
-    displayName = `${userInfo.firstname} ${userInfo.lastname}`;
-  } else {
-    displayName = get(userInfo, 'username', '');
-  }
+  const { userDisplayName } = useAppInfos();
 
   return (
     <MainNav condensed={condensed}>
@@ -81,7 +72,7 @@ const LeftMenu = ({ generalSectionLinks, pluginsSectionLinks }) => {
       </NavSections>
 
       <NavUser src="https://avatars.githubusercontent.com/u/3874873?v=4" to="/me">
-        {displayName}
+        {userDisplayName}
       </NavUser>
 
       <NavCondense onClick={() => setCondensed(s => !s)}>
diff --git a/packages/core/admin/admin/src/pages/Users/EditPage/index.js b/packages/core/admin/admin/src/pages/Users/EditPage/index.js
index 23c2e8b008..b4d33f99ed 100644
--- a/packages/core/admin/admin/src/pages/Users/EditPage/index.js
+++ b/packages/core/admin/admin/src/pages/Users/EditPage/index.js
@@ -3,12 +3,14 @@ import { useRouteMatch, useHistory } from 'react-router-dom';
 import { useIntl } from 'react-intl';
 import PropTypes from 'prop-types';
 import pick from 'lodash/pick';
+import get from 'lodash/get';
 import {
   CustomContentLayout,
   Form,
   GenericInput,
   SettingsPageTitle,
-  // auth,
+  auth,
+  useAppInfos,
   useFocusWhenNavigate,
   useNotification,
   useOverlayBlocker,
@@ -24,6 +26,7 @@ import { Main } from '@strapi/parts/Main';
 import { Stack } from '@strapi/parts/Stack';
 import { CheckIcon } from '@strapi/icons';
 import MagicLink from 'ee_else_ce/pages/Users/components/MagicLink';
+import { formatAPIErrors } from '../../../utils';
 import { fetchUser, putUser } from './utils/api';
 import layout from './utils/layout';
 import { editValidation } from '../utils/validations/users';
@@ -37,6 +40,7 @@ const EditPage = ({ canUpdate }) => {
     params: { id },
   } = useRouteMatch('/settings/users/:id');
   const { push } = useHistory();
+  const { setUserDisplayName } = useAppInfos();
 
   const toggleNotification = useNotification();
   const { lockApp, unlockApp } = useOverlayBlocker();
@@ -65,15 +69,35 @@ const EditPage = ({ canUpdate }) => {
     },
   });
 
-  const handleSubmit = async body => {
+  const handleSubmit = async (body, actions) => {
     lockApp();
 
     try {
-      await putUser(id, body);
+      const data = await putUser(id, body);
+
+      const userInfos = auth.getUserInfo();
+
+      // The user is updating himself
+      if (id.toString() === userInfos.id.toString()) {
+        auth.setUserInfo(data);
+
+        const userDisplayName = get(body, 'username', `${body.firstname} ${body.lastname}`);
+
+        setUserDisplayName(userDisplayName);
+      }
     } catch (err) {
+      // FIXME when API errors are ready
+      const errors = formatAPIErrors(err.response.data);
+      const fieldsErrors = Object.keys(errors).reduce((acc, current) => {
+        acc[current] = errors[current].id;
+
+        return acc;
+      }, {});
+
+      actions.setErrors(fieldsErrors);
       toggleNotification({
         type: 'warning',
-        message: data.message,
+        message: get(err, 'response.data.message', 'notification.error'),
       });
     }