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Find solutions to activation limit errors.
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    When you launch an Adobe app, you get an error stating that sign-in failed, there is an activation limit, or the maximum number of activations has been exceeded. These errors occur if you try to use the app on too many computers. To resolve the error, follow the steps below.

    Can't access your old computer? If you can't access your previous computer (for example, you reformatted the hard drive or lost the computer), don't worry. We can help you deactivate your app from your old device. Make sure that you have your serial number or Adobe ID handy, and then contact us.

    Uninstalled your app without deactivating? Uninstalling the app from a computer does not necessarily deactivate its license. If you uninstalled your app and are getting a message that you've exceeded your activation limit, try reinstalling the app on the old computer. Then, follow the steps below to deactivate the app on the old computer and activate it on your new one.

    Have a different issue? If you are having a different activation problem, see Activation and deactivation troubleshooting.

    Serial number already in use by the maximum allowed computers

    If you get an "Activation limit reached" or similar error in a Creative Cloud app, see Creative Cloud "Activation limit reached" or "Sign in failed" error for solutions.

    To resolve other activation errors in Creative Cloud, see Creative Cloud activation and sign in troubleshooting.


    Subscription version

    If you have an Acrobat DC subscription, see Creative Cloud "Activation limit reached" or "Sign in failed" error.

    Non-subscription (standalone) version

    If you have a standalone, non-subscription version of Acrobat DC, you can use the app on up to two computers. To use Acrobat on a third computer, simply sign out of Acrobat on one of the other computers.

    Note:

    You must be connected to the Internet for these steps to work.

    1. Connect to the Internet and launch the app on one of your other computers.

    2. Choose Help > Sign Out.

    3. Try activating the app on the new computer again.


     

    A single license for Adobe CS6 and earlier applications lets you install an app on two computers. However, you can use the application on only one computer at a time.

    To install the application on a third computer, deactivate the application on the computer on which you no longer want to use the software. Then, activate it on the new computer.

    Note:

    You must be connected to the Internet for these steps to work.

    1. On the old computer, connect to the Internet, and then launch the app.

    2. Choose Help > Deactivate.

      Choose Deactivate
    3. On the new computer, connect to the Internet, and then launch the app.

    4. Choose Help > Activate.


    A single license for Adobe CS3, Acrobat 8, and earlier applications lets you install an app on two computers. However, you can use the application on only one computer at a time.

    To install the application on a third computer, deactivate the application on the computer on which you no longer want to use the software. Then, activate it on the new computer.

    1. On the old computer, connect to the Internet, and then launch the app.

    2. Choose Help > Deactivate or Help > Transfer Activation.

    3. If you want to activate on another computer, select Erase My Serial Number From This Computer.

    4. When you see the Deactivation Successful message, click Exit.

    5. On the new computer, connect to the Internet, and then launch the app.

    6. Choose Help > Activate.


     
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