I'm trying to sync and employee's new HTC Droid Incredible to our exchange server. Using the Exchange shell prompt I enter in the person's device id and alias to authorize just that device to sync with their account. Once I do that, no other device can sync in the future unless I enter the command line again with the new Device ID. The command I use is: Set-CASMailbox -Identity: "tonysmit" -ActiveSyncAllowedDeviceIDs: "<DeviceID_1>" This employee had an old Motorolla Droid already synced using this method, so their account is 'locked' until I enter in the new Device ID. I have another employee who has their Incredible successfully synced, but it was their first device. When I first sync a device with an employee who's never had one associated before, I go into Outlook Anywhere webmail, and can see the device ID. Based off of the second employee, the Incredible's Device ID isn't based off of the serial number or any other device info. I even downloaded ID and My Phone Info from the marketplace store, and none of those numbers that it reports back resemble anything with the ActiveSync Device ID of the successful employee. For iPhones, it's simple, just add Appl to the serial number and that's the phone's device ID. Any thoughts on how to get the ActiveSync device ID on an Incredible with out first successfully syncing it to the account first?