Here's a quick video showing you how to convert from a Test Drive to a full subscription:
First, go to your Account tab and locate the "Purchase Full Subscription" button in the Subscriptions panel.
Or, if your test drive has already expired, select the button here:
Next, adjust your seat count, if necessary, and continue on to entering your payment information.
You'll be asked some questions about how to configure your subscription, and what to do with the users that you added to your Test Drive.
Question 1:
Question 2:
Question 3:
Question 3:
Question 4:
All done!