diff --git a/src/User/AuthClient/Microsoft365.php b/src/User/AuthClient/Microsoft365.php
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+<?php
+
+/*
+ * This file is part of the 2amigos/yii2-usuario project.
+ *
+ * (c) 2amigOS! <http://2amigos.us/>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Da\User\AuthClient;
+
+use Da\User\Contracts\AuthClientInterface;
+use Da\User\Traits\AuthClientUserIdTrait;
+use yii\authclient\OAuth2;
+
+/**
+ * Microsoft365 allows authentication via Microsoft365 OAuth2 flow.
+ * Before using Microsoft365 OAuth2 you must register your Microsoft Azure Application
+ * @see https://portal.azure.com
+ *
+ * Note: the registered App must have the following:
+ * -Authentication: 'Redirect URIs' set 'user/security/auth?authclient=microsoft365' as an absolute URL
+ *  e.g. https://domain.com/index.php/user/security/auth?authclient=microsoft365
+ * -API Permissions: 'Microsoft Graph' > 'User.Read'
+ * -Decide whether the App should be
+ *   single-tenant (only allow one Company to use it),
+ *   multi-tenant (also allow other Companies to use it),
+ *   personal account (allow accounts like xbox, skype etc. to use it)
+ *   or both "multi-tenant and personal-account"
+ * -In the Microsoft world even the Authorization URls are different dendinding if you allow single/multi/personal accounts.
+ *  This client supports them: just set up the 'signInAudience' property (value for this it's in the manifest of your Azure App)
+ *  accordingly to your needs; it defaults to the widest permissions available "AzureADandPersonalMicrosoftAccount"
+ *  (details: https://learn.microsoft.com/en-us/entra/identity-platform/supported-accounts-validation)
+ *
+ * Example application configuration:
+ *
+ * ```
+ * 'components' => [
+ *     ...
+ *     'authClientCollection' => [
+ *         'class' => 'yii\authclient\Collection',
+ *         'clients' => [
+ *             'microsoft365' => [
+ *                 'class' => 'yii\authclient\clients\Microsoft365',
+ *                 'clientId' => 'a5e19acd-dc50-4b0a-864a-d13b9347ddf9',
+ *                 'clientSecret' => 'ljSAd89.lvk34NV-3t4v3_2kl_42Rt4klr234',
+ *                 'signInAudience' => 'AzureADandPersonalMicrosoftAccount',
+ *             ],
+ *         ],
+ *     ]
+ *     ...
+ * ]
+ * ```
+ */
+class Microsoft365 extends OAuth2 implements AuthClientInterface
+{
+    use AuthClientUserIdTrait;
+
+    public const ACCOUNT_TYPE_SINGLETENANT = 'AzureADMyOrg'; // Accounts in this organizational directory only (Single tenant)
+    public const ACCOUNT_TYPE_MULTITENANT = 'AzureADMultipleOrgs'; // Accounts in any organizational directory (Any Microsoft Entra directory - Multitenant)
+    public const ACCOUNT_TYPE_MULTITENANTANDPERSONAL = 'AzureADandPersonalMicrosoftAccount'; // Accounts in any organizational directory (Any Microsoft Entra directory - Multitenant) and personal Microsoft accounts (such as Skype, Xbox)
+    public const ACCOUNT_TYPE_PERSONAL = 'PersonalMicrosoftAccount'; // Personal Microsoft accounts only
+
+    /**
+     * @var string Micrososft365 Graph API endpoint.
+     */
+    public $apiBaseUrl = 'https://graph.microsoft.com/v1.0';
+
+    /**
+     * @var string 'signInAudience' in Microsoft Azure App manifest
+     */
+    public $signInAudience;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function init()
+    {
+        parent::init();
+
+        if (is_null($this->scope)) {
+            $this->scope = 'User.Read';
+        }
+
+        if (is_null($this->signInAudience)) {
+            $this->signInAudience = self::ACCOUNT_TYPE_MULTITENANTANDPERSONAL;
+        }
+
+        // In the Microsoft world Authorization URls are different if you use single-tenant or multi-tenant (@see https://learn.microsoft.com/en-us/entra/identity-platform/supported-accounts-validation)
+        // This OAuth2 client supports also these scenarios: just set up 'signInAudience' accordingly to your needs. It defaults to the widest "AzureADandPersonalMicrosoftAccount"
+        switch ($this->signInAudience) {
+            case self::ACCOUNT_TYPE_SINGLETENANT:
+                $this->authUrl  = 'https://login.microsoftonline.com/organizations/oauth2/v2.0/authorize';
+                $this->tokenUrl = 'https://login.microsoftonline.com/organizations/oauth2/v2.0/token';
+                break;
+            case self::ACCOUNT_TYPE_PERSONAL:
+                $this->authUrl  = 'https://login.microsoftonline.com/consumers/oauth2/v2.0/authorize';
+                $this->tokenUrl = 'https://login.microsoftonline.com/consumers/oauth2/v2.0/token';
+                break;
+            case self::ACCOUNT_TYPE_MULTITENANT:
+            case self::ACCOUNT_TYPE_MULTITENANTANDPERSONAL:
+            default:
+                $this->authUrl  = 'https://login.microsoftonline.com/common/oauth2/v2.0/authorize';
+                $this->tokenUrl = 'https://login.microsoftonline.com/common/oauth2/v2.0/token';
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function initUserAttributes()
+    {
+        return $this->api('me', 'GET');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function applyAccessTokenToRequest($request, $accessToken)
+    {
+        $request->headers->set('Authorization', 'Bearer '.$accessToken->getToken());
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function defaultName()
+    {
+        return 'microsoft365';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function defaultTitle()
+    {
+        return 'Microsoft 365';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getEmail()
+    {
+        return $this->getUserAttributes()['mail'];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getUsername()
+    {
+        return $this->getUserAttributes()['userPrincipalName'];
+    }
+
+}