diff --git a/source/environment.html.md b/source/environment.html.md
index ef61f32..9edbaa5 100644
--- a/source/environment.html.md
+++ b/source/environment.html.md
@@ -59,3 +59,17 @@ PLUME_LOGO_192=icons/trwnh/paragraphs/plumeParagraphs192.png
 PLUME_LOGO_256=icons/trwnh/paragraphs/plumeParagraphs256.png
 PLUME_LOGO_512=icons/trwnh/paragraphs/plumeParagraphs512.png
 ```
+
+Plume support delegating authentication via LDAP.
+- `LDAP_ADDR`: address of the LDAP server
+- `LDAP_BASE_DN`: base DN used when binding, see explanation below
+- `LDAP_USER_NAME_ATTR`: attribut with user name ised when binding, see explanation below (default=`cn`)
+- `LDAP_USER_MAIL_ATTR`: attribut containing the mail address of the user (default=`mail`)
+- `LDAP_TLS`: connect to the LDAP server using TLS (default=false)
+
+Plume determines what to bind using `LDAP_BASE_DN`, `LDAP_USER_NAME_ATTR` and the user name.
+Assuming what you need Plume to bind is `username={user name},ou=users,dc=your-org`, the configuration would be the following:
+```bash
+LDAP_BASE_DN=ou=users,dc=your-org
+LDAP_USER_NAME_ATTR=username
+```
diff --git a/source/installation/config.html.md b/source/installation/config.html.md
index ab62f2f..9dc8dba 100644
--- a/source/installation/config.html.md
+++ b/source/installation/config.html.md
@@ -83,6 +83,8 @@ plm instance new
 plm users new --admin
 ```
 
+Note if you want to use LDAP: you should still create an administrator account, at least to give admin rights to your own LDAP account once it's registered.
+
 On **Windows**, there might be an error creating the admin user. To get around this, you need to run:
 ```
 plm users new --admin -n "adminusername" -N "Human Readable Admin Name" -b "Biography of Admin here" -p hackmeplease