diff --git a/config/settings.yml b/config/settings.yml
index e993f91a3..6aea21504 100644
--- a/config/settings.yml
+++ b/config/settings.yml
@@ -135,7 +135,7 @@ auto-db-migrate: "_env:AUTO_DB_MIGRATE:true"
 # External sources used for user authentication and userdata lookups
 user-auth:
 # mode: single-source
-  protocol: azureadv2
+  protocol: "_env:USERAUTH_MODE:azureadv2"
   config:
     client-id:     "_env:AZURECLIENTID:00000000-0000-0000-0000-000000000000"
     client-secret: "_env:AZURECLIENTSECRET:''"