So my girlfriend has this setup with her Apple IDs, where she has one Apple ID as her primary, with which she is logged into iCloud on all her devices, and she also has a second Apple ID which she only uses as an email account.
I would rather like to streamline this whole setup by migrating the email address of the secondary Apple ID to the primary.
I do know that it is not possible to simply merge the two Apple IDs, but I thought there may be a way to migrate an email address. The emails associated with that address wouldn't even have to be migrated over since I can do that manually within Outlook.