Adobe has scheduled a maintenance window to begin at 1:30am EDT on Tuesday, August 28. The maintenance will take the Adobe Activation Service offline and is expected to take approximately six hours.
During this maintenance window, users who have not previously activated a device will be unable to activate their device. However, users who have previously activated devices should still be able to activate additional devices. Other services should not be affected by this maintenance window and users should still be able to download and read Adobe eBooks during this time.