AWS m2 documentation change

Service: m2 · 2026-07-01 · Documentation low

File: m2/latest/userguide/both-application-connectivity.md

Summary

Added announcement about discontinuation of new customer access to AWS Mainframe Modernization self-managed experience, with continued security investments for existing customers.

Security assessment

While mentioning ongoing security improvements, the change doesn't address any specific security vulnerability or weakness. It's a service availability update without security incident context.

Diff

diff --git a/m2/latest/userguide/both-application-connectivity.md b/m2/latest/userguide/both-application-connectivity.md
index 3b7522005..12ccd2c25 100644
--- a//m2/latest/userguide/both-application-connectivity.md
+++ b//m2/latest/userguide/both-application-connectivity.md
@@ -9 +9,3 @@ Common causeResolution
-AWS Mainframe Modernization Service (Managed Runtime Environment experience) is no longer open to new customers. For capabilities similar to AWS Mainframe Modernization Service (Managed Runtime Environment experience) explore AWS Mainframe Modernization Service (Self-Managed Experience). Existing customers can continue to use the service as normal. For more information, see [AWS Mainframe Modernization availability change](https://docs.aws.amazon.com/m2/latest/userguide/mainframe-modernization-availability-change.html).
+After careful consideration, we have made the decision to close new customer access to **AWS Mainframe Modernization self-managed experience** , effective July 30, 2026. Existing customers can continue to use the service as normal. AWS continues to invest in security and availability improvements for AWS Mainframe Modernization self-managed experience, but we do not plan to introduce new features. For more information, see [AWS Mainframe Modernization availability change](https://docs.aws.amazon.com/m2/latest/userguide/mainframe-modernization-availability-change.html). 
+
+**AWS Mainframe Modernization Service (Managed Runtime Environment experience)** is no longer open to new customers. For capabilities similar to AWS Mainframe Modernization Service (Managed Runtime Environment experience) explore AWS Mainframe Modernization Service (Self-Managed Experience). Existing customers can continue to use the service as normal. For more information, see [AWS Mainframe Modernization availability change](https://docs.aws.amazon.com/m2/latest/userguide/mainframe-modernization-availability-change.html).