AWS m2 documentation change

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

File: m2/latest/userguide/ba-endpoints-build-urls.md

Summary

Updated service availability notice: Added announcement about closing new customer access to AWS Mainframe Modernization self-managed experience effective July 30, 2026, while maintaining existing service and security investments.

Security assessment

Change documents service lifecycle updates without evidence of security incident response. Security mentions are general commitments, not specific fixes or advisories.

Diff

diff --git a/m2/latest/userguide/ba-endpoints-build-urls.md b/m2/latest/userguide/ba-endpoints-build-urls.md
index f7a64aba2..6fb3fb413 100644
--- a//m2/latest/userguide/ba-endpoints-build-urls.md
+++ b//m2/latest/userguide/ba-endpoints-build-urls.md
@@ -7 +7,3 @@
-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).