diff --git a/components/http_client.rst b/components/http_client.rst
index 06c0ad246d1..9a567f3c3bc 100644
--- a/components/http_client.rst
+++ b/components/http_client.rst
@@ -130,14 +130,18 @@ each request (which overrides any global authentication)::
 
     // Use the same authentication for all requests
     $httpClient = HttpClient::create([
-        // HTTP Basic authentication with only the username and not a password
+        // HTTP Basic authentication (there are multiple ways of configuring it)
         'auth_basic' => ['the-username'],
-
-        // HTTP Basic authentication with a username and a password
         'auth_basic' => ['the-username', 'the-password'],
+        'auth_basic' => 'the-username:the-password',
 
         // HTTP Bearer authentication (also called token authentication)
         'auth_bearer' => 'the-bearer-token',
+
+        // Microsoft NTLM authentication (there are multiple ways of configuring it)
+        'auth_ntlm' => ['the-username'],
+        'auth_ntlm' => ['the-username', 'the-password'],
+        'auth_ntlm' => 'the-username:the-password',
     ]);
 
     $response = $httpClient->request('GET', 'https://...', [
@@ -147,6 +151,14 @@ each request (which overrides any global authentication)::
         // ...
     ]);
 
+.. note::
+
+    The NTLM authentication mechanism requires using the cURL transport.
+
+.. versionadded:: 4.4
+
+    The ``auth_ntlm`` option was introduced in Symfony 4.4.
+
 Query String Parameters
 ~~~~~~~~~~~~~~~~~~~~~~~
 
diff --git a/reference/configuration/framework.rst b/reference/configuration/framework.rst
index d280fe4d97b..4980613d440 100644
--- a/reference/configuration/framework.rst
+++ b/reference/configuration/framework.rst
@@ -116,6 +116,7 @@ Configuration
     * `scope`_
     * `auth_basic`_
     * `auth_bearer`_
+    * `auth_ntlm`_
     * `base_uri`_
     * `bindto`_
     * `cafile`_
@@ -747,6 +748,20 @@ auth_bearer
 The token used to create the ``Authorization`` HTTP header used in HTTP Bearer
 authentication (also called token authentication).
 
+auth_ntlm
+.........
+
+**type**: ``string``
+
+.. versionadded:: 4.3
+
+    The ``auth_ntlm`` option was introduced in Symfony 4.4.
+
+The username and password used to create the ``Authorization`` HTTP header used
+in the `Microsoft NTLM authentication protocol`_. The value of this option must
+follow the format ``username:password``. This authentication mechanism requires
+using the CURL-based transport.
+
 base_uri
 ........
 
@@ -2776,3 +2791,4 @@ to know their differences.
 .. _`default_socket_timeout`: https://php.net/manual/en/filesystem.configuration.php#ini.default-socket-timeout
 .. _`PEM formatted`: https://en.wikipedia.org/wiki/Privacy-Enhanced_Mail
 .. _`haveibeenpwned.com`: https://haveibeenpwned.com/
+.. _`Microsoft NTLM authentication protocol`: https://docs.microsoft.com/en-us/windows/desktop/secauthn/microsoft-ntlm