It's bumper update day for Rainbow Six Siege and servers are currently down (or just returning) while Operation Grim Sky rolls out for PC, PlayStation 4 and Xbox One.
PC servers returned at 1pm UTC; PS4 servers will return at 2pm UTC; and Xbox One servers return at 3pm UTC.
Operation Grim Sky brings two new operatives who ought to shake the meta up, as well as map reworks and a host of balance changes. But it also introduces dynamic resolution scaling on console to both improve how the game looks when the processing load is light, and to improve how the game performs when the processing load is heavy.