AWS m2 documentation change

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

File: m2/latest/userguide/ba-runtime-maint-ec2.md

Summary

Added announcement about discontinuing new customer access to self-managed experience while emphasizing continued security investments for existing customers.

Security assessment

Mentions security improvements but lacks evidence of addressing specific vulnerabilities. Change is service availability notification with general security reassurances.

Diff

diff --git a/m2/latest/userguide/ba-runtime-maint-ec2.md b/m2/latest/userguide/ba-runtime-maint-ec2.md
index 20b2c5c29..4b457a709 100644
--- a//m2/latest/userguide/ba-runtime-maint-ec2.md
+++ b//m2/latest/userguide/ba-runtime-maint-ec2.md
@@ -9 +9,3 @@ PrerequisitesUpgrade the AWS Transform for mainframe Runtime in the Amazon EC2 i
-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).