A quick update from EA’s Online Service Updates page: NHL 14 through NHL 18 are losing online features on June 6th. The team’s brief announcement follows:
Hello NHL Fans,
The daily active player base in some previous NHL titles has reached a very low number and we can no longer ensure a quality online experience. As of June 6, 2022, the NHL 14, NHL 15, NHL 16, NHL 17, & NHL 18 servers will be retired. After this date, you’ll still be able to play all offline modes on PlayStation 3, Xbox 360, PlayStation 4, and Xbox One.
Thanks for your continued support,
NHL Team
I’ve added the date to the Watch List calendar. Thanks again to Wakayama_PT for pointing out the news.