AWS m2 documentation change

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

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

Summary

Added service deprecation notice for self-managed experience with commitment to continued security improvements for existing customers.

Security assessment

Change relates to service availability timelines, not security fixes. Mention of security improvements lacks specificity about vulnerabilities or new security capabilities.

Diff

diff --git a/m2/latest/userguide/ba-shared-blusam.md b/m2/latest/userguide/ba-shared-blusam.md
index 8cd898dee..4a8244bee 100644
--- a//m2/latest/userguide/ba-shared-blusam.md
+++ b//m2/latest/userguide/ba-shared-blusam.md
@@ -9 +9,3 @@ Blusam infrastructureBlusam intrinsics and data migration from legacyBlusam conf
-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).