AWS m2 documentation change
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 that Managed Runtime Environment experience remains closed to new customers.
Security assessment
The change communicates service availability changes without referencing any specific security vulnerability, incident, or weakness. The mention of 'security improvements' is part of ongoing maintenance commitments, not documentation of new security features or vulnerability fixes.
Diff
diff --git a/m2/latest/userguide/ba-migration-notes.md b/m2/latest/userguide/ba-migration-notes.md index cb457e781..a7807e090 100644 --- a//m2/latest/userguide/ba-migration-notes.md +++ b//m2/latest/userguide/ba-migration-notes.md @@ -9 +9,3 @@ Common upgradesMigrating from 3.10.0 to 4.0.0Migrating from 5.85.0 to 5.125.0 -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).