Browser/Email :: Show Contacts In To Field Of Mail App?

I thought I'd install Windows 10 Threshold 2 (not to make the same mistake twice, on a laptop I hardly use this time) to see if the built-in Microsoft apps are now any better than they were in July. Disappointingly, with the exception of being able to turn off 'Conversation View', the Mail app is just as diabolically poor as it was back then. But on top of that, another thing I noticed this time is that when you type a name into the 'To:' field, it doesn't even look up that name / email address from your 'People' app contacts. The auto-complete feature only populates for people you've previously emailed.

So basically, if you haven't emailed someone, it won't show their name despite their details and email address being listed in the 'People' app.

Of course, another problem with not populating the auto-complete addresses from your address book is that if a contact changes their email address and you update their details in the 'People' app, the Mail app will still use the old email address in the autocomplete dropdown, causing you to keep emailing the wrong address.

Did Microsoft seriously release a Mail app that can't even look up names in your contacts list?