AWS m2 documentation change

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

File: m2/latest/userguide/security-iam.md

Summary

Updated service availability notice: Added announcement about closure of new customer access to AWS Mainframe Modernization self-managed experience effective July 30, 2026, and reiterated Managed Runtime Environment closure.

Security assessment

Change is informational about service availability timelines. Mentions security investments but doesn't document new security features or address vulnerabilities.

Diff

diff --git a/m2/latest/userguide/security-iam.md b/m2/latest/userguide/security-iam.md
index 724b4e80f..a6a4fbba8 100644
--- a//m2/latest/userguide/security-iam.md
+++ b//m2/latest/userguide/security-iam.md
@@ -9 +9,3 @@ AudienceAuthenticating with identitiesManaging access using policies
-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).