diff --git a/configuration.md b/configuration.md
index 81bc4b0..31db056 100644
--- a/configuration.md
+++ b/configuration.md
@@ -79,3 +79,7 @@ this exception should be thrown:
 
   > No default account store is mapped to the specified application. A default
     account store is required for registration.
+
+* If external provider directories are mapped to the application, but `stormpath.web.callback.enabled` has been set to `false`, the end user cannot complete the SAML workflow and this warning should be logged:
+
+  > stormpath.web.callback.enabled is set to false, but SAML directories are mapped to this application.  Provider login workflows cannot be completed if this callback endpoint is disabled.