https://wccftech.com/mgsv-phantom-pain-patch-1-17-quiet/

MSGV The Phantom Pain patch 1.17 has been released which makes Quiet playable in the game’s Forward Operating Base online mode.

In addition, the brand-new update adds easy and hard difficulties to Event FOBs and offers new weapons to develop in Grades 7,8,9,10 and 11.