What is the "archived-expanded-entitlements.xcent" file in IOS app?
Basically, the xcent file is a list of entitlements that the app has requested. Since Xcode 6, the entitlements list is also embedded in the app bundle as the xcent file. This file is important when it comes to submitting to the App Store and provides more helpful error messages when provisioning errors occur.
If you want more info, here is a good in-depth article on code signing and provisioning.
When we archive through Xcode : Product > Archive , it includes an ‘archived-expanded-entitlements.xcent’ file in the final .ipa package.