The first big Battlefield 1 update will be coming soon and as a result, all live servers will be temporarily taken offline whilst the patch is applied.
EA has nicknamed the upcoming patch as the fall update and it will come with a number of useful changes. EA and DICE have both remained quite open about the future features they plan to release to Battlefield 1, but so far we're not sure which of the planned features will make it into the fall update. We may see the introduction of hardcore and fog of war modes, and we may also see a number of overall optimizations and gameplay improvements.
Whilst the servers will be going down for a short time, DICE has mentioned that the servers shouldn't be down for long - they've even opted to pick less busy hours to keep the outage complaints at a minimum. The outage, if all goes to plan, should last for just an hour. The outage times may differ depending on which platform you're using, but as a general guide, take a look at the listed times below to get an idea for when to keep yourself focused on another game instead.
PC: Multiplayer will be offline for 1h starting 08.00 UTC / 12.00 AM PT.
PS4: Multiplayer will be offline for 1h starting 10.00 UTC / 2.00 AM PT.
Xbox One: Multiplayer will be offline for 1h starting 12.00 UTC / 4.00 AM PT