diff --git a/admin_manual/configuration_user/user_auth_ftp_smb_imap.rst b/admin_manual/configuration_user/user_auth_ftp_smb_imap.rst
index 56622779e..d61b69577 100644
--- a/admin_manual/configuration_user/user_auth_ftp_smb_imap.rst
+++ b/admin_manual/configuration_user/user_auth_ftp_smb_imap.rst
@@ -1,87 +1,9 @@
-===========================================
-User authentication with IMAP, SMB, and FTP
-===========================================
+==================================================
+User authentication with IMAP, SMB, FTP and others
+==================================================
 
-You may configure additional user backends
-in Nextcloud's configuration :file:`config/config.php` using the following
-syntax:
+You may configure additional user backends with the 
+External User Backends (user_external) app.
 
-::
-
-  "user_backends" => [
-    [
-      "class"     => ...,
-      "arguments" => [
-        ...
-      ],
-    ],
-  ],
-
-.. note:: A non-blocking or correctly configured SELinux setup is needed
-   for these backends to work. Please refer to the :ref:`selinux-config-label`.
-
-Currently the “External user support” (user_external) app, which you need to
-enable first (See :doc:`../apps_management`)
-provides the following user backends:
-
-IMAP
-----
-Provides authentication against IMAP servers
-
-- **Class:** OC_User_IMAP
-- **Arguments:**  a mailbox string as defined `in the PHP documentation <http://www.php.net/manual/en/function.imap-open.php>`_
-- **Dependency:** php-imap (See :doc:`../installation/source_installation`)
-- **Example:**
-
-::
-
-  "user_backends" => [
-    [
-      "class"     => "OC_User_IMAP",
-      "arguments" => [
-        '{imap.gmail.com:993/imap/ssl}'
-      ],
-    ],
-  ],
-
-SMB
----
-Provides authentication against Samba servers
-
-- **Class:** OC_User_SMB
-- **Arguments:** the samba server to authenticate against
-- **Dependency:** PHP smbclient module or smbclient (see 
-  :doc:`../configuration_files/external_storage/smb`)
-- **Example:**
-
-::
-
-  "user_backends" => [
-    [
-      "class"     => "OC_User_SMB",
-      "arguments" => [
-        'localhost'
-      ],
-    ],
-  ],
-
-FTP
----
-
-Provides authentication against FTP servers
-
-- **Class:** OC_User_FTP
-- **Arguments:** the FTP server to authenticate against
-- **Dependency:** php-ftp (See :doc:`../installation/source_installation`)
-- **Example:**
-
-::
-
-  "user_backends" => [
-    [
-      "class"     => "OC_User_FTP",
-      "arguments" => [
-        'localhost'
-      ],
-    ],
-  ],
+See https://github.com/nextcloud/user_external#readme 
+for an up to date documentation.