Update: The issue has been resolved. All players should now be able to connect to Modern Warfare, Warzone, and Black Ops 4 servers across platforms.
Many users are currently experiencing issues accessing Call of Duty: Modern Warfare and Call of Duty: Warzone servers at this time.
Users are being met with a Connection Failed notice, and then being put into a Server Queue while attempting to log onto Call of Duty: Modern Warfare and Call of Duty: Warzone.
This error does not appear to be affecting many players right now, but a certain set of users. Players can try restarting their console and game to get back online.
At the time of this writing (12:30PM ET on May 25), official website status pages has been updated to confirm they are aware of this issue and are actively investigating.
The Call of Duty: Modern Warfare and Warzone servers have been experiencing many issues over the last few weeks with matchmaking issues and more as many players are online due to stay at home orders and lifestyle recently.
We will update when the issue is resolved.