In order to use the DOT server, you need to generate and use a license for each DIS server. No HW ID is required, as the license is not connected to any hardware ID.
You can use the customer portal to generate the license file: https://customerportal.innovatrics.com.
If you do not yet have the relevant product added to your account or you have already used all available license credits, you need to request the license through your sales representative or log a ticket in the support portal.