As the admin, I would think I could manage the user information for others users, i.e. update their name or email address. I can’t see any way to do that, only to create an invite. Is that correct?

That is correct, user profiles are global. If you could modify someone elses details or password, you could access other accounts or projects they have access to.

Could you change it so we can at least see their email address? I had a customer who couldn’t remember which email he used to sign up and I couldn’t tell him.