A site ID is a unique code to identify your installation of Teradata Database on AWS.Although this site ID is not required to use Teradata Database on AWS, it isrequired to receive Teradata support.
When you subscribe to Teradata Database on AWS, youreceive a welcome email that enables you to register for support. After your supportregistration is complete, you receive another email with your Master Customer Record,Site ID (AMZ followed by 12 numbers), user ID, and password.
Existing Teradata customers who have on-premises Teradata systems cannot use theirprevious site IDs on Teradata Database on AWS. You must obtain a new site ID.