AWS Security ChangesHomeSearch

AWS m2 documentation change

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

File: m2/latest/userguide/ba-shared-concept.md

Summary

Updated service availability notice to announce closure of new customer access for self-managed experience by July 30, 2026, while maintaining security/availability improvements for existing customers.

Security assessment

The change announces service deprecation timelines but doesn't reference any specific vulnerability, exploit, or security incident. The mention of 'security improvements' is part of general maintenance commitments without detailing security features or vulnerabilities.

Diff

diff --git a/m2/latest/userguide/ba-shared-concept.md b/m2/latest/userguide/ba-shared-concept.md
index cdf949d8c..4017ec94a 100644
--- a//m2/latest/userguide/ba-shared-concept.md
+++ b//m2/latest/userguide/ba-shared-concept.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).