Note in the README

Author: sandhose

README.md

@@ -1,6 +1,12 @@
 # OAuth2.0 + OpenID Connect Provider for Matrix Homeservers
 
-MAS (Matrix Authentication Service) is an OAuth 2.0 and OpenID Provider server for Matrix.
+## matrix-authentication-service is now actively maintained at [element-hq/matrix-authentication-service](https://github.com/element-hq/matrix-authentication-service)
+
+MAS (Matrix Authentication Service) is an OAuth 2.0 and OpenID Provider server for Matrix developed from 2021 through 2024 as part of the Matrix.org Foundation. The Matrix.org Foundation is not able to resource maintenance of matrix-authentication-service and it continues to be developed by Element.
+
+See [The future of Synapse and Dendrite blog post](https://matrix.org/blog/2023/11/06/future-of-synapse-dendrite/) for more information.
+
+---
 
 It has been created to support the migration of Matrix to an OpenID Connect (OIDC) based authentication layer as per [MSC3861](https://github.com/matrix-org/matrix-doc/pull/3861).