There are few similar questions on SO, but it's not completely clear still...
Recently we transferred our app to different AppStore account. Now when we try to submit app update to new account, itunesconnect produces the warning:
"The previous version of software has an application-identifier value of ['XXXXXXXX.id.bundle] and the new version of software being submitted has an application-identifier of ['YYYYYYYY.id.bundle']. This will result in a loss of keychain access."
We really use keychain to store api authorization information. And now we concern that after all current users upgrade the app, they'll lost their authorization and will be signed out.
Can someone confirm our concerns? I tried to reproduce the case: I've installed current version of the app from AppStore (this app has old application prefix), signed in, then I installed test build via TestFlight (it has already new app prefix), and after launch the app no sign out has happened.