diff --git a/.env.example b/.env.example
index c6dace3..bcdeae5 100644
--- a/.env.example
+++ b/.env.example
@@ -22,6 +22,8 @@ INSECURE=true
 #COMPOSE_FILE=docker-compose.yml:weboffice/collabora.yml:external-proxy/opencloud.yml:external-proxy/collabora.yml
 # Keycloak Shared User Directory
 #COMPOSE_FILE=docker-compose.yml:weboffice/collabora.yml:traefik/opencloud.yml:traefik/collabora.yml:idm/ldap-keycloak.yml:traefik/ldap-keycloak.yml
+# External IDP
+#COMPOSE_FILE=docker-compose.yml:weboffice/collabora.yml:traefik/opencloud.yml:traefik/collabora.yml:idm/external-idp.yml
 
 ## Traefik Settings ##
 # Note: Traefik is always enabled and can't be disabled.