diff --git a/apps/user_ldap/lib/User_LDAP.php b/apps/user_ldap/lib/User_LDAP.php
index 5a44510005262..650c974da8173 100644
--- a/apps/user_ldap/lib/User_LDAP.php
+++ b/apps/user_ldap/lib/User_LDAP.php
@@ -45,14 +45,15 @@
 use OCA\User_LDAP\User\OfflineUser;
 use OCA\User_LDAP\User\User;
 use OCP\IConfig;
+use OCP\IUserBackend;
 use OCP\IUserSession;
 use OCP\Notification\IManager as INotificationManager;
+use OCP\User\Backend\ICountMappedUsersBackend;
 use OCP\User\Backend\ICountUsersBackend;
-use OCP\IUserBackend;
 use OCP\UserInterface;
 use Psr\Log\LoggerInterface;
 
-class User_LDAP extends BackendUtility implements IUserBackend, UserInterface, IUserLDAP, ICountUsersBackend {
+class User_LDAP extends BackendUtility implements IUserBackend, UserInterface, IUserLDAP, ICountUsersBackend, ICountMappedUsersBackend {
 	/** @var \OCP\IConfig */
 	protected $ocConfig;
 
@@ -598,6 +599,10 @@ public function countUsers() {
 		return $entries;
 	}
 
+	public function countMappedUsers(): int {
+		return $this->access->getUserMapper()->count();
+	}
+
 	/**
 	 * Backend name to be shown in user management
 	 * @return string the name of the backend to be shown
diff --git a/apps/user_ldap/lib/User_Proxy.php b/apps/user_ldap/lib/User_Proxy.php
index 93420bbb470b4..b98fa8da0ff5e 100644
--- a/apps/user_ldap/lib/User_Proxy.php
+++ b/apps/user_ldap/lib/User_Proxy.php
@@ -33,11 +33,14 @@
 
 use OCA\User_LDAP\User\User;
 use OCP\IConfig;
+use OCP\IUserBackend;
 use OCP\IUserSession;
 use OCP\Notification\IManager as INotificationManager;
+use OCP\User\Backend\ICountMappedUsersBackend;
 use OCP\User\Backend\ICountUsersBackend;
+use OCP\UserInterface;
 
-class User_Proxy extends Proxy implements \OCP\IUserBackend, \OCP\UserInterface, IUserLDAP, ICountUsersBackend {
+class User_Proxy extends Proxy implements IUserBackend, UserInterface, IUserLDAP, ICountUsersBackend, ICountMappedUsersBackend {
 	private $backends = [];
 	/** @var User_LDAP */
 	private $refBackend = null;
@@ -389,6 +392,19 @@ public function countUsers() {
 		return $users;
 	}
 
+	/**
+	 * Count the number of mapped users
+	 */
+	public function countMappedUsers(): int {
+		$this->setup();
+
+		$users = 0;
+		foreach ($this->backends as $backend) {
+			$users += $backend->countMappedUsers();
+		}
+		return $users;
+	}
+
 	/**
 	 * Return access for LDAP interaction.
 	 *
diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index d396dbfcb33e2..779758eb9cc7f 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -598,6 +598,7 @@
     'OCP\\UserStatus\\IUserStatus' => $baseDir . '/lib/public/UserStatus/IUserStatus.php',
     'OCP\\User\\Backend\\ABackend' => $baseDir . '/lib/public/User/Backend/ABackend.php',
     'OCP\\User\\Backend\\ICheckPasswordBackend' => $baseDir . '/lib/public/User/Backend/ICheckPasswordBackend.php',
+    'OCP\\User\\Backend\\ICountMappedUsersBackend' => $baseDir . '/lib/public/User/Backend/ICountMappedUsersBackend.php',
     'OCP\\User\\Backend\\ICountUsersBackend' => $baseDir . '/lib/public/User/Backend/ICountUsersBackend.php',
     'OCP\\User\\Backend\\ICreateUserBackend' => $baseDir . '/lib/public/User/Backend/ICreateUserBackend.php',
     'OCP\\User\\Backend\\ICustomLogout' => $baseDir . '/lib/public/User/Backend/ICustomLogout.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index 20a7114b94ae0..b39fadb032136 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -631,6 +631,7 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OCP\\UserStatus\\IUserStatus' => __DIR__ . '/../../..' . '/lib/public/UserStatus/IUserStatus.php',
         'OCP\\User\\Backend\\ABackend' => __DIR__ . '/../../..' . '/lib/public/User/Backend/ABackend.php',
         'OCP\\User\\Backend\\ICheckPasswordBackend' => __DIR__ . '/../../..' . '/lib/public/User/Backend/ICheckPasswordBackend.php',
+        'OCP\\User\\Backend\\ICountMappedUsersBackend' => __DIR__ . '/../../..' . '/lib/public/User/Backend/ICountMappedUsersBackend.php',
         'OCP\\User\\Backend\\ICountUsersBackend' => __DIR__ . '/../../..' . '/lib/public/User/Backend/ICountUsersBackend.php',
         'OCP\\User\\Backend\\ICreateUserBackend' => __DIR__ . '/../../..' . '/lib/public/User/Backend/ICreateUserBackend.php',
         'OCP\\User\\Backend\\ICustomLogout' => __DIR__ . '/../../..' . '/lib/public/User/Backend/ICustomLogout.php',
diff --git a/lib/private/Support/Subscription/Registry.php b/lib/private/Support/Subscription/Registry.php
index 87070e7a0dcb8..7aafa539a0bc8 100644
--- a/lib/private/Support/Subscription/Registry.php
+++ b/lib/private/Support/Subscription/Registry.php
@@ -34,15 +34,15 @@
 use OCP\IServerContainer;
 use OCP\IUserManager;
 use OCP\Notification\IManager;
-use OCP\User\Backend\ICountUsersBackend;
 use OCP\Support\Subscription\Exception\AlreadyRegisteredException;
 use OCP\Support\Subscription\IRegistry;
 use OCP\Support\Subscription\ISubscription;
 use OCP\Support\Subscription\ISupportedApps;
+use OCP\User\Backend\ICountMappedUsersBackend;
+use OCP\User\Backend\ICountUsersBackend;
 use Psr\Log\LoggerInterface;
 
 class Registry implements IRegistry {
-
 	/** @var ISubscription */
 	private $subscription = null;
 
@@ -189,7 +189,9 @@ private function getUserCount(): int {
 		$userCount = 0;
 		$backends = $this->userManager->getBackends();
 		foreach ($backends as $backend) {
-			if ($backend->implementsActions(Backend::COUNT_USERS)) {
+			if ($backend instanceof ICountMappedUsersBackend) {
+				$userCount += $backend->countMappedUsers();
+			} elseif ($backend->implementsActions(Backend::COUNT_USERS)) {
 				/** @var ICountUsersBackend $backend */
 				$backendUsers = $backend->countUsers();
 				if ($backendUsers !== false) {
diff --git a/lib/public/User/Backend/ICountMappedUsersBackend.php b/lib/public/User/Backend/ICountMappedUsersBackend.php
new file mode 100644
index 0000000000000..bf8770d484f96
--- /dev/null
+++ b/lib/public/User/Backend/ICountMappedUsersBackend.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2022 Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @author Côme Chilliet <come.chilliet@nextcloud.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCP\User\Backend;
+
+/**
+ * @since 24.0.7
+ */
+interface ICountMappedUsersBackend {
+	/**
+	 * @since 24.0.7
+	 *
+	 * @return int The number of users already mapped to a Nextcloud account
+	 */
+	public function countMappedUsers(): int;
+}