AWS m2 documentation change

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

File: m2/latest/userguide/ba-endpoints-jac.md

Summary

Updated service availability notice: Added announcement about closing new customer access to self-managed experience (effective July 30, 2026) and reiterated existing closure of managed runtime environment.

Security assessment

General service announcement mentions security improvements but doesn't document any specific security features or address vulnerabilities. No evidence of security incident response.

Diff

diff --git a/m2/latest/userguide/ba-endpoints-jac.md b/m2/latest/userguide/ba-endpoints-jac.md
index 01d5abc1e..5aa2b5b9c 100644
--- a//m2/latest/userguide/ba-endpoints-jac.md
+++ b//m2/latest/userguide/ba-endpoints-jac.md
@@ -9 +9,3 @@ JICS resources managementOtherJAC users management endpoints
-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).