Issue
This might be a rather simple question, but is it possible to log into an EC2 Windows Server instance over RDP, using an IAM user's credentials, or am I stuck using the password from the KeyPair?
Solution
The only way to do that would be to have IAM identity center setup with SSM Fleet manager. From the documentation:
Fleet Manager integrates with IAM Identity Center so you can connect to your instances without providing additional credentials.
Otherwise, you have to specify either username/password or a the .pem file:
When connecting to your instance, you can use Windows credentials or the Amazon EC2 key pair (.pem file) associated with the instance for authentication.
Answered By - Paolo Answer Checked By - Marilyn (WPSolving Volunteer)