Now that you have added a device to the portal, you will need to create an App ID. An App ID has a unique 10-character Bundle Seed ID prefix generated by Apple and a Bundle Identifier suffix that is created by the Team Admin in the Provisioning Portal. An App ID could look similar to the following example: 7R456G1254.com.companyname.YourApplication. To create a new App ID follow these steps:
Click on the New App ID button in the App ID section of the portal.
Fill out the Description field with the name of your application.
You are already assigned a Bundle Seed ID (also known as Team ID).
In the Bundle Identifier (App ID Suffix) field, specify a unique identifier for your app. It is up to you as to how you want to identify your app, but it is recommended that you use the reverse-domain style string, that is
com.domainname.appname.Note
You can create a wildcard character in the Bundle Identifier that you can share among a suite of applications using the same Keychain access. To do this, simply create a single App ID with an asterisk (*) at the end. You would place this in the field for the Bundle Identifier either by itself or at the end of your string:
com.domainname.*.More information on this topic can be found in the App IDs section of the iOS Provisioning Portal: https://developer.apple.com/ios/manage/bundles/howto.action.
All UDIDs are unique on every device and we can locate them in Xcode and iTunes. When we added a device in the iOS Provisioning Portal we took the UDID, which consists of 40 hex characters and made sure we created a device name so we can identify what we're using for development.
We now have an App ID for applications we want to install on a device. An App ID is a unique identifier that iOS uses to allow your application to connect to the Apple Push Notification service, share keychain data between applications, and communicate with external hardware accessories that you wish to pair your iOS application with.