ios - Deploying ad-hoc apps on ipad without knowing the clients UDID -

i'm developing exclusive app clients. app distributed them specifically, don't want have uploaded on app store. problem is: when packing app .ipa file, need specify udids of devices able run app. trying pry them out of clients inconvinient and, frankly, practically impossible.

originally, thought impossible because of apple's strict safety policy, we've found out it's possible somehow if have enterprise account, do. can somehow make work installing .mobileprovision file along .ipa on arbitrary device , make work. we've seen our competition this:

http://www.devicepharm.com/2011/08/how-to-install-enterprise-applications-on-the-ipad/

what kind of certificates/mobileprovisions must create make work? how make app distribuable this?

if use beta fabric distribute builds. need obtain email ids invite them beta. once accept invitation on mobile device. missing udids shown when try send build email ids through fabric plugin can include in adhoc provisioning profile. also, thing note once client has accepted invite can see device , udid in web login of fabric use in adding device in developer portal/provisioning profile.

you can find more info here. https://dev.twitter.com/crashlytics/beta-distribution