diff --git a/Architecture.md b/Architecture.md
index 4145be7..f4033c2 100644
--- a/Architecture.md
+++ b/Architecture.md
@@ -70,6 +70,8 @@ The OAuth2 and OpenID Connect endpoints are currently set to the following value
  AuthenticationUserDetailsService - Used by Spring Security to load a user from an authentication token
  UserInfoRepository - repository of user information that is fed into the UserInfoEndpoint's service
 
+An in-memory Authentication Manager is configured in [user-context.xml](https://github.com/mitreid-connect/OpenID-Connect-Java-Spring-Server/blob/master/openid-connect-server/src/main/webapp/WEB-INF/user-context.xml).
+
 //Which of these have we implemented and which are straight SECOAUTH?
 
 ## Token Management