Final Fantasy XIV is temporarily logging everyone off once a day to keep login queues moving
So the game is putting in another measure for the moment. Once per day, with an hour of warning, all characters will be logged off of a server. Ten minutes later, everyone can log back in. An exact time has not been announced, but the intent is clearly to catch people who are off at work and sitting AFK (and thus will be logged off and not back in) to keep the queues moving for people who are playing. It’s a band-aid solution, but it’s explicitly meant as a way to keep the queues moving for players trying to get in and play during peak hours.