UPDATE – Nov. 5 at 11:30AM ET: Activision Support has stated that they are restarting the Call of Duty servers to improve the experience.
We're performing server fixes & will be restarting Call of Duty services to improve the quality of connection. Sorry for the inconvenience
— Activision Support (@ATVIAssist) November 5, 2017
UPDATE – Nov. 4 at 7:16PM ET: Sledgehammer Games has stated that they are issuing updates to improve the experience. Players may be solo in Headquarters while maintenance is being conducted.
Updates deployed to improve online server experience. Solo HQ is part of the maintenance. FYI – You can invite friends to your HQ.
— Sledgehammer Games (@SHGames) November 4, 2017
Condrey also confirmed that Leaderboards are currently disabled as they work to fix server issues.
Leaderboards arent being updated in-game, but all player stats ARE being captured & will be reflected once @ATVIAssist server issues resolve
— M.Condrey in HQ (@MichaelCondrey) November 4, 2017
There was also a server error was caused some players to have their ranks be reset in Call of Duty: WWII. If you were one of those players, please reach out to Activision Support at @ATVIAssist on Twitter. SHG has confirmed a fix for this issue has already gone live in game earlier today.
UPDATE – Nov. 4 at 1:36PM ET: Servers are starting to come back online now.
UPDATE – Nov. 4 at 1:30PM ET: A new playlist update for Call of Duty: WWII has gone live on PS4 and Xbox One, but it appears the update has caused the servers to temporarily go offline. We’ll update as we learn more.
Activision and Sledgehammer have yet to provide an update on what’s been going on, other than they’re working on a solution. Activision’s server status page has not been updated yet to reflect the current outage.