https://www.polygon.com/2017/9/18/16327478/destiny-2-server-maintenance-offline

Servers for both Destiny and Destiny 2 are currently offline for maintenance, with a period of downtime that’s planned to last for four hours, according to Bungie’s support site.

The maintenance window began at 7 a.m. PT, at which point players were no longer able to log in to Destiny’s servers. If they were playing at the time, though, they can stay online until 8 a.m. PT, when “all online players will be removed from Destiny.” Bungie is aiming to complete the maintenance and bring both games’ servers back online by 11 a.m. PT.