I'd be surprised if they had to. A Windows Live login, like a Google account or Yahoo ID is tied to an email address. Asking for access for your personal email

I'd be surprised if they had to. A Windows Live login, like a Google account or Yahoo ID is tied to an email address. Asking for access for your personal email during an interview process should be obviously off-limits for even the most clueless companies. Among other things, your email would contain communications with other potential employers.