I just got a new iPhone and proceeded to transfer everything to the new iPhone using Apple's transfer procedure.
Partway through the transfer when it was downloading my apps it asked for the password from an AppleID that likely belonged to the boss at a company I worked at a decade or more ago.
I seem to recall this happening the last time I got a new phone and cancelling the password request solved that particular issue and allowed the iPhone to continue with setup.
How can I find what exactly the app was that generated the password request? It wasn't indicated what app needed authorization when asking for the password. It is mostly just strange and mildly annoying (once!) as it never prompts for a password again.
I have no way of getting in touch with the former boss and have been through my list of apps "purchased" and recognize nothing that could even remotely be associated with that company.
Any idea how to run down what app is doing this and deleting it from my account?