diff --git a/config/defaults.inc.php b/config/defaults.inc.php
index 14df04f7c7..f9fa25f422 100644
--- a/config/defaults.inc.php
+++ b/config/defaults.inc.php
@@ -384,6 +384,9 @@
 // Mandatory: OAuth scopes to request (space-separated string)
 $config['oauth_scope'] = null;
 
+// Optional: OAuth scopes specific to identity request (space-separated string)
+$config['oauth_scope_identity'] = null;
+
 // Optional: additional query parameters to send with login request (hash array)
 $config['oauth_auth_parameters'] = [];
 
@@ -455,6 +458,7 @@
 // $config['oauth_identity_uri'] = "https://graph.microsoft.com/v1.0/me";
 // $config['oauth_identity_fields'] = ['email', 'userPrincipalName'];
 // $config['oauth_scope'] = "https://outlook.office365.com/IMAP.AccessAsUser.All https://outlook.office365.com/SMTP.Send User.Read offline_access";
+// $config['oauth_scope_identity'] = "https://graph.microsoft.com/IMAP.AccessAsUser.All SMTP.Send offline_access User.Read";
 // $config['oauth_auth_parameters'] = ['nonce' => mt_rand()];
 
 // ----------------------------------
diff --git a/program/include/rcmail_oauth.php b/program/include/rcmail_oauth.php
index d942fbcc42..cc4a685797 100644
--- a/program/include/rcmail_oauth.php
+++ b/program/include/rcmail_oauth.php
@@ -161,6 +161,7 @@ public function __construct($options = [])
                 'language' => ['locale'],
             ]),
             'scope' => $this->rcmail->config->get('oauth_scope', ''),
+            'scope_identity'  => $this->rcmail->config->get('oauth_scope_identity', ''),
             'timeout' => $this->rcmail->config->get('oauth_timeout', 10),
             'verify_peer' => $this->rcmail->config->get('oauth_verify_peer', true),
             'auth_parameters' => $this->rcmail->config->get('oauth_auth_parameters', []),
@@ -641,7 +642,14 @@ public function request_access_token($auth_code, $state = null)
 
             // request user identity (email)
             if (empty($username)) {
-                $fetched_identity = $this->fetch_userinfo($authorization);
+                if($this->options['scope_identity']) {
+                    $this->mask_auth_data($data);
+                    $refresh_response = $this->refresh_access_token($data, $this->options['scope_identity']);
+                    $data_ident = $refresh_response['token'];
+                    $authorization_ident = $refresh_response['authorization'];
+                }
+
+                $fetched_identity = $this->fetch_userinfo($authorization_ident);
 
                 $this->log_debug('fetched identity: %s', json_encode($fetched_identity, true));
 
@@ -720,11 +728,14 @@ public function request_access_token($auth_code, $state = null)
      * If successful, this will update the `oauth_token` entry in
      * session data.
      *
+     * @param array $token
+     * @param string $change_scope Optional, changes scope if specified
+     *
      * @return array|false Updated authorization data
      *
      * @see https://datatracker.ietf.org/doc/html/rfc6749#section-6
      */
-    public function refresh_access_token(array $token)
+    public function refresh_access_token(array $token, $change_scope = null)
     {
         $oauth_token_uri = $this->options['token_uri'];
         $oauth_client_id = $this->options['client_id'];
@@ -741,6 +752,10 @@ public function refresh_access_token(array $token)
                 'client_secret' => $oauth_client_secret,
             ];
 
+            if($change_scope) {
+                $form['scope'] = $change_scope;
+            }
+
             if ($this->options['pkce']) {
                 $form['code_verifier'] = $this->rcmail->decrypt($_SESSION['oauth_code_verifier']);
             }