AWS Systems Manager Change Manager is no longer open to new customers. Existing customers can continue to use the service as normal. For more information, see AWS Systems Manager Change Manager availability change.
Working with Session Manager
You can use the AWS Systems Manager console, the Amazon Elastic Compute Cloud (Amazon EC2) console, or the AWS Command Line Interface (AWS CLI) to start sessions that connect you to the managed nodes your system administrator has granted you access to using AWS Identity and Access Management (IAM) policies. Depending on your permissions, you can also view information about sessions, resume inactive sessions that haven't timed out, and end sessions. After a session is established, it is not affected by IAM role session duration. For information about limiting session duration with Session Manager, see Specify an idle session timeout value and Specify maximum session duration.
For more information about sessions, see What is a session?