In the game manager Client profile options, you can allow or deny access to contact email addresses. This seems to allow or deny access globally, rather than distinguishing between only a user getting their own contact email or getting other's contact email. In other words, if I disable this option, and call LogInWithCustomID where the profile contraints request the PlayerProfile and contact email addresses, there is an error. This is in spite of the fact that the description of GetPlayerCombinedInfo says that PII will be available for the calling user.
Is it just not possible to expose contact email addresses only for the calling user?