Ehhhh, that may not be the email address that the invited user prefers to use (or may not even know what email it was). For example, in my last (extremely larg

Ehhhh, that may not be the email address that the invited user prefers to use (or may not even know what email it was). For example, in my last (extremely large) company, IT would helpfully create multiple email addresses for us (UUID plus firstname.lastname) and you could also ask them to create one that you're used to using. So if someone emailed me at work, it was not obvious which email they used and if I then needed to use those credentials to login on a different device, I wouldn't know what to use.