Authentication means verifying the user’s identity and connecting that identity with the user’s Creative Cloud membership. Authorization includes checking a user’s membership to determine its overall status, determining which applications and services the user’s membership allows the user to access, and discovering any restrictions or special permissions granted to the user. Most of the licensing services run on Adobe servers. A few of them, however, run locally. For example, Creative Cloud desktop app, is considered by Adobe a licensing service that runs locally. (It is also a deployment service, because you can download and install apps.) The local licensing services depend on Adobe-hosted licensing services for all their functions. The licensing services are visible to users in activities such as logging in, accepting terms of use, and accepting end-user license agreements.
Apps can be downloaded and installed on client machines using various methods. For information, see App delivery strategies. Users need to sign in to license the apps. To license the apps, users can use one of the following: