AWS m2 documentation change

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

File: m2/latest/userguide/assembler-conversion.md

Summary

Updated service availability notice: Added announcement about closing new customer access to AWS Mainframe Modernization self-managed experience effective July 30, 2026, while retaining existing service operations and security investments.

Security assessment

The diff contains no evidence of security vulnerability fixes or new security documentation. The security reference is incidental to service availability messaging.

Diff

diff --git a/m2/latest/userguide/assembler-conversion.md b/m2/latest/userguide/assembler-conversion.md
index 47ad7977d..ff039e470 100644
--- a//m2/latest/userguide/assembler-conversion.md
+++ b//m2/latest/userguide/assembler-conversion.md
@@ -7 +7,3 @@
-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).