Your Creative Cloud subscription lets you install your apps on two devices. When you sign in to a device and Adobe detects that you have exceeded your device activation limit, you are prompted with a message indicating this. This article, describes the different device activation limit scenarios and what you can do in ease case.
You can also learn more about the number of devices on which you can use your Creative Cloud subscription.
If you have exceeded your device activation limit, you can sign out of one of the other devices on which you are currently signed in. To do this, follow these steps:
If you launch an app on the device that you have signed out of in Step 2 above, you are prompted with the device activation limit dialog box.
When you are prompted with the device activation limit message, you can choose to sign out of this device with this Adobe ID. After you are signed out of this device with the current Adobe ID, you can then sign in again with another Adobe ID.