From 8c020cead886848673b019770cd482416766c30f Mon Sep 17 00:00:00 2001
From: Yadd <yadd@debian.org>
Date: Wed, 29 Jun 2022 14:51:55 +0200
Subject: [PATCH] Add doc (#2491)

---
 doc/sources/admin/configlocation.rst | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/doc/sources/admin/configlocation.rst b/doc/sources/admin/configlocation.rst
index da9abf78a..f92e0e17f 100644
--- a/doc/sources/admin/configlocation.rst
+++ b/doc/sources/admin/configlocation.rst
@@ -128,6 +128,21 @@ configuration.
        instanceName = LLNG_Demo
 
 
+.. tip::
+
+
+    It is possible to use environment variable placeholders anywhere in
+    configuration. Those placeholders will be replaced by each LLNG component
+    using environment variables set locally.
+    The format is: ``%SERVERENV:VariableName%``.
+    To enable this feature, you must edit ``lemonldap-ng.ini`` to set
+    ``useServerEnv`` value in [configuration] section:
+
+    .. code:: ini
+
+       [configuration]
+       useServerEnv = 1
+
 
 Manager API
 -----------