Hello, You are receiving this message because our records show you are a Support customer that uses Trusted Advisor checks to monitor your AWS environment. On September 9, 2025, Trusted Advisor will remove ten (10) Trusted Advisor checks. Newer, more accurate checks are currently available that replace these checks. The following is the list of legacy Trusted Advisor checks to be removed on September 9, 2025: Legacy Trusted Advisor Check Name and (Check ID) 1. Low Utilization Amazon EC2 Instances: (Check ID - Qch7DwouX1) 2. Underutilized Amazon EBS Volumes: (Check ID - DAvU99Dc4C) 3. Amazon EBS over-provisioned volumes: (Check ID - COr6dfpM03) 4. Amazon RDS Idle DB Instances: (Check ID - Ti39halfu8) 5. AWS Lambda over-provisioned functions for memory size: (Check ID - COr6dfpM05) 6. Savings Plan: (Check ID - vZ2c2W1srf) 7. Amazon Relational Database Service (RDS) Reserved Instance Optimization (Check ID - 1qazXsw23e) 8. Amazon Redshift Reserved Node Optimization: (Check ID- 1qw23er45t) 9. Amazon ElastiCache Reserved Node Optimization: (Check ID - h3L1otH3re) 10. Amazon OpenSearch Service Reserved Instance Optimization: (Check ID - 7ujm6yhn5t) These legacy checks are replaced by the following newer checks: Check Name and (Check ID) 1. Amazon EC2 Cost Optimization recommendations for instances: (Check ID - c1z7kmr00n) 2. Amazon EBS cost optimization recommendations for volumes: (Check ID - c1z7kmr02n) 3. Amazon RDS cost optimization recommendations for DB instances: (Check ID - c1z7kmr03n) 4. AWS Lambda cost optimization recommendations for functions: (Check ID - c1z7kmr05n) 5. AWS Savings Plan purchase recommendations for compute: (Check ID - c1z7kmr09n) 6. Amazon RDS Reserved Instance purchase recommendations: (Check ID - c1z7kmr11n) 7. Amazon Redshift reserved node purchase recommendations: (Check ID - c1z7kmr12n) 8. Amazon ElastiCache reserved node purchase recommendations: (Check ID - c1z7kmr13n) 9. Amazon OpenSearch Service Reserved Instance purchase recommendations: (Check ID - c1z7kmr14n) We recommend Trusted Advisor customers start utilizing the newer checks and recommendations as soon as possible, because they offer our customers better and more contextual recommendations on cost optimization opportunities in their AWS account. What Do You Need To Do To Receive Recommendations from the Newer Checks? In order to receive the full set of recommendations from these newer Trusted Advisor checks, you will need to: Opt In to Cost Optimization Hub [1]. Opt In to Compute Optimizer [2]. Opting in to Cost Optimization Hub (COH) provides some cost savings recommendations, but full access to all recommendation types requires opting in to both COH and Compute Optimizer. While COH alone offers savings plans and Reserved Instance recommendations, idle and rightsizing recommendations are only available through Compute Optimizer, which analyzes resource usage to provide these additional insights. If you have already opted in to Cost Optimization Hub, you are already receiving recommendations for these new checks. If you have not opted in to Cost Optimization Hub, it will take 24-48 hours for the new recommendations to arrive in your AWS account. For more information, refer to AWS documentation on Cost Optimization Hub and Compute Optimizer [1][2]. For additional information on the legacy and replacement Trusted Advisor checks, refer to AWS documentation on Trusted Advisor checks [3]. If you have any questions or concerns, please reach out to AWS Support [4]. [1] https://docs.aws.amazon.com/cost-management/latest/userguide/coh-getting-sta... [2] https://docs.aws.amazon.com/compute-optimizer/latest/ug/account-opt-in.html [3] https://docs.aws.amazon.com/awssupport/latest/user/trusted-advisor-check-ref... [4] https://aws.amazon.com/support Sincerely, Amazon Web Services Amazon Web Services, Inc. is a subsidiary of Amazon.com, Inc. Amazon.com is a registered trademark of Amazon.com, Inc. This message was produced and distributed by Amazon Web Services Inc., 410 Terry Ave. North, Seattle, WA 98109-5210 --- Reference: https://health.aws.amazon.com/health/home?region=us-east-1#/event-log?eventI... [Beginning September 15, 2025, emails about AWS Health events will be delivered via AWS User Notifications. AWS User Notifications provides de-duplication of emails within AWS organizations and a configuration interface to manage subscriptions. Emails about AWS Health events will be sent from a new sender address: health@aws.com and in HTML format, rather than plain text. Recipients may need to validate that email rules continue to work with the changes. To switch to the new experience early, please visit https://console.aws.amazon.com/notifications/home?region=us-east-1#/managed-...]