AWS m2 documentation change

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

File: m2/latest/userguide/system-utilities.md

Summary

Updated service availability notice to announce closure of new customer access for self-managed experience and reiterate managed environment closure

Security assessment

The change communicates service lifecycle updates without addressing specific vulnerabilities. Mention of 'security improvements' refers to ongoing maintenance, not remediation of a security incident.

Diff

diff --git a/m2/latest/userguide/system-utilities.md b/m2/latest/userguide/system-utilities.md
index e200d7c98..9c2c2f02d 100644
--- a//m2/latest/userguide/system-utilities.md
+++ b//m2/latest/userguide/system-utilities.md
@@ -9 +9,3 @@ Configure and deploy Utility web applicationAvailable Utility programs
-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).