The "Apple Push Notification" page (Apple.cshtml) in the Web site that the sample creates has the label "Device Id" under the Notification section. This can be misleading to APNs/iOS newbies because this field is NOT for the unique ID of the phone/device. This text box is for the DEVICE TOKEN that the APNs assigns to the device+app combo when it registers with APN service. The label should probably say, "Device Token" instead of "Device Id". The help text under this label in the "span" element may want to include something like, "You can locate the DEVICE TOKEN that APNs assigns to your specific device+app combination inside of the Xcode Output window if you run the "WAToolkit" app code that MS provides on github (https://github.com/ microsoft-dpe/wa-toolkit-ios ) while your client phone/device is connected to your Mac."