I'm developing an app for my company and we're going through the process of slowly letting people into the "beta" by adding their iPads to the company's iOS Dev Center accounts. From there we do an ad hoc build for local Intranet distribution.
At my last gig, I would direct people to one of those "find my UDID for me" apps, then get them to send me the UDID it found.
iOS 7 has cut this off - those apps are all gone now and if you do still have one, it returns some GUID that has nothing to do with the UDID.
So what I'm having to do is connect each of these things to my Mac, then get the UDID from iTunes, which is kind of a hassle (but less tedious than trying to explain to them how to get it from iTunes, assuming they even have it installed). And sometimes it tries to sync with my Mac, which doesn't seem to have any effect other than putting on provisioning profiles I don't want on the device. And at least once I've had an iPad just suddenly decide to upgrade itself from iOS 6 to iOS 7 which I'm not sure is related to being plugged in (and in this case the user didn't want it upgraded).
So is there any other way to get the UDID from the iPad other than plugging it into a machine?
TO BE CLEAR: I'm not trying to get the UDID in an app, I'm just trying to think of the quickest way to get the UDID to add to the device list in our developer profile for distribution.
Here's my research results:
Apple has hidden the UDID from all public APIs, starting with iOS 7. Any UDID that begins with FFFF is a fake ID. The "Send UDID" apps that previously worked can no longer be used to gather UDID for test devices. (sigh!)
The UDID is shown when a device is connected to XCode (in the organizer), and when the device is connected to iTunes (although you have to click on 'Serial Number' to get the Identifier to display.
If you need to get the UDID for a device to add to a provisioning profile, and can't do it yourself in XCode, you will have to walk them through the steps to copy/paste it from iTunes.
UPDATE -- see okiharaherbst's answer below for a script based approach to allow test users to provide you with their device UDIDs by hosting a mobileconfig file on a server