Installing a subscription copy of FrameMaker 12

As kglad says, the Adobe ID should sign you in.

However, I have recently upgraded and the Adobe ID does not register.

I have contacted Adobe and they are looking in to it.  I'm not sure you can do anything else.

if he downloaded the subscription installation file, you should be prompted for the adobe id used to make the purchase:

During the course of your purchase and installation, you are asked to create or enter an Adobe ID. An Adobe ID is simply your email address.

When you install your software, you are required to enter the same Adobe ID that you used to subscribe to:

• Help ensure that the person who subscribed is the same person who is installing the software
• Enable Adobe to send you important account information if your subscription is about to expire or cannot be charged

Adobe respects your privacy and sends you information about other Adobe products or services only if you explicitly opt in for such messages.

Ensure that your Adobe ID is your current active email address. If not, update it.

here's more info, http://www.adobe.com/products/framemaker/faq.html#subscriptioninformation