Windows 10 People App - where does it get it's "recent contacts" from and why can't i delete them?

[jrauman]

There is an App named People on my Windows 10 computer. When i open it, i see no contacts. So then i choose the "filter contacts" button and click "recent contacts (microsoft people)". Suddenly a list of email addresses show up that i have emailed with my outlook account. Where is People getting these from? How do i tell it not to do that? How do i delete these recent contacts (it wont let you - it greys out the delete button)? This is very odd.

More...