How do I register an MSDN or a TechNet subscription license?
The registration process is slightly different for a subscription license than for a Microsoft software product. After entering your eOpen authorization code at https://eopen.microsoft.com, you select the appropriate link (for example: Activating MSDN Subscriptions or Activating TechNet Subscriptions). When the subscriptions Web page appears, enter your eOpen authorization code in the promotional code field and specify the media type to automatically initiate registration.