AWS m2 documentation change

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

File: m2/latest/userguide/ba-bi-tabclose.md

Summary

Updated service availability notice for AWS Mainframe Modernization, adding closure date for self-managed experience and clarifying ongoing security investments

Security assessment

The change announces service closure dates but doesn't address any specific vulnerability. The mention of security improvements is general maintenance information without documenting security features or addressing vulnerabilities.

Diff

diff --git a/m2/latest/userguide/ba-bi-tabclose.md b/m2/latest/userguide/ba-bi-tabclose.md
index 743a43c64..8c133d606 100644
--- a//m2/latest/userguide/ba-bi-tabclose.md
+++ b//m2/latest/userguide/ba-bi-tabclose.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).