diff --git a/src/Auth/Backend.php b/src/Auth/Backend.php
index 10ff60e..5ab562f 100644
--- a/src/Auth/Backend.php
+++ b/src/Auth/Backend.php
@@ -21,6 +21,18 @@ class Backend {
     return null;
   }
 
+  /**
+   * Update a user
+   * @param \EesyPHP\Auth\User $user      The user object
+   * @param array<string,mixed> $changes  Array of changes
+   * @param boolean $no_change_as_success Consider no change provided as success
+   *                                      (optional, default: false)
+   * @return boolean True if user was updated, false otherwise
+   */
+  public static function update_user($user, $changes, $no_change_as_success=False) {
+    return false;
+  }
+
   /**
    * Check a user password
    * @param \EesyPHP\Auth\User $user The user object
diff --git a/src/Auth/Ldap.php b/src/Auth/Ldap.php
index 1b2f596..f8f6633 100644
--- a/src/Auth/Ldap.php
+++ b/src/Auth/Ldap.php
@@ -263,6 +263,69 @@ class Ldap extends Backend {
     return new User($username, '\\EesyPHP\\Auth\\Ldap', $info);
   }
 
+  /**
+   * Update a user
+   * @param \EesyPHP\Auth\User $user      The user object
+   * @param array<string,mixed> $changes  Array of changes
+   * @param boolean $no_change_as_success Consider no change provided as success
+   *                                      (optional, default: false)
+   * @return boolean True if user was updated, false otherwise
+   */
+  public static function update_user($user, $changes, $no_change_as_success=False) {
+    Log::debug("Ldap::update_user(%s): changes=%s", $user->dn, vardump($changes));
+    if (!$user->dn) {
+      Log::error("Ldap::update_user(): Invalid user provided (no DN)");
+      return false;
+    }
+    if (!is_array($changes)) {
+      Log::error("Ldap::update_user(%s): Invalid changes provided (not an array)", $user->dn);
+      return false;
+    }
+    $attrs = App::get('auth.ldap.user_attributes', null, 'array');
+    $updated_attrs = [];
+    $deleted_attrs = [];
+    foreach($changes as $attr => $value) {
+      if ($attr == "dn") continue;
+      if (!array_key_exists($attr, $attrs)) {
+        Log::error(
+          "Ldap::update_user(%s): Changes on unknown attribute %s provided",
+          $user->dn, $attr
+        );
+        return false;
+      }
+      $ldap_name = Config::get("$attr.ldap_name", $attr, 'string', false, $attrs);
+      if ($value)
+        $updated_attrs[$ldap_name] = ensure_is_array($value);
+      else
+        $deleted_attrs[] = $ldap_name;
+    }
+    if (empty($updated_attrs) && empty($deleted_attrs)) {
+      Log::debug("Ldap::update_user(%s): no change provided", $user->dn);
+      return $no_change_as_success;
+    }
+    if (!self :: connect()) return false;
+    // @phpstan-ignore-next-line
+    $entry = self :: $connection -> getEntry($user->dn);
+    // @phpstan-ignore-next-line
+    if (Net_LDAP2::isError($entry)) {
+      Log::warning('User "%s" (%s) not found', $user->username, $user->dn);
+      return false;
+    }
+    if ($updated_attrs) $entry->replace($updated_attrs);
+    if ($deleted_attrs) $entry->delete($deleted_attrs);
+    $result = $entry -> update();
+    // @phpstan-ignore-next-line
+    if (Net_LDAP2::isError($result)) {
+      Log::error(
+        'Fail to update user "%s" (%s): %s',
+        $user->username, $user->dn, $result->getMessage()
+      );
+      return false;
+    }
+    Log::info('User "%s" (%s) updated', $user->username, $user->dn);
+    return true;
+  }
+
   /**
    * Check a user password
    * @param \EesyPHP\Auth\User $user The user object
diff --git a/src/Auth/User.php b/src/Auth/User.php
index 922cf4c..ae88d6d 100644
--- a/src/Auth/User.php
+++ b/src/Auth/User.php
@@ -2,8 +2,10 @@
 
 namespace EesyPHP\Auth;
 
+use EesyPHP\Hook;
 use EesyPHP\Log;
 use function EesyPHP\ensure_is_array;
+use function EesyPHP\vardump;
 
 class User {
 
@@ -25,6 +27,12 @@ class User {
    */
   private $info;
 
+  /**
+   * Original user object (set on change and keep to handle update)
+   * @var User|null
+   */
+  private $original_user;
+
   /**
    * Constructor
    * @param string $username The username
@@ -66,6 +74,7 @@ class User {
    * @return void
    */
   public function __set($key, $value) {
+    Log::trace("%s->__set(%s): new value=%s", $this, $key, vardump($value));
     switch ($key) {
       case 'username':
         $this -> username = strval($value);
@@ -77,6 +86,8 @@ class User {
         $this -> info = ensure_is_array($value);
         break;
       default:
+        if (!isset($this ->original_user))
+          $this -> original_user = new User($this->username, $this->backend, $this->info);
         $this -> info[$key] = $value;
     }
   }
@@ -119,4 +130,30 @@ class User {
     return $this -> namename;
   }
 
+  /**
+   * Update user
+   * @return bool
+   */
+  public function save() {
+    if (!isset($this -> original_user)) {
+      Log::debug("%s->save(): original_user not set, no change to save.", $this);
+      return true;
+    }
+    $changes = [];
+    foreach ($this->info as $attr => $value)
+      if ($this->original_user->$attr != $value)
+        $changes[$attr] = $value;
+    if (!$changes) {
+      Log::debug("%s->save(): no info updated, no change to save", $this);
+      return true;
+    }
+    $result = call_user_func(
+      array($this -> backend, 'update_user'),
+      $this -> original_user, $changes, true
+    );
+    if ($result)
+      Hook::trigger("user_updated", ["user" => $this, "changes" => $changes]);
+    return $result;
+  }
+
 }