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The message means Adobe is activated on too many computers. in order to reduce the number of devices, you need to do the following:
- Close all Adobe products
- Open Windows Explorer
- (Make sure View → Hidden Items is checked off)
- Navigate to C:\ProgramData\Adobe\OperatingConfigs
- Clear out the folder
- Re-start Adobe again
- A message that Adobe is installed on too many machines should now pip and give you the option to deactivate a license
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