License Licenses are assigned to User Accounts when Users make purchases. (Licenses can also be assigned manually when Users qualify for access via institutional account purchases or other offline arrangements.) Licenses contain the terms governing the access to your content, including the duration of access, if downloads or attachments are included, pages allowed, etc. The terms are determined by the settings on the Offer that the User uses to make the purchase. Once a license has been created, it will not change based on updates to the Offer that created it. This is desirable, because you want flexibility to try different product ideas without affecting Users who have already made purchases.