Everyone using this addon within a guild will see other's keys and weekly best.

A cache system will synchronize among players, propagating offline data. As long as there is at least someone connected in the guild, when you log in, you should be able to see the keys of everyone in your guild (even if you were offline when they did their runs).

Everyone need to have this addon installed to report its keystone/best.

To open the window: /aok

Big shout-out to Kaminaris, author of StdUI (used here) and Keystone Manager (which I mostly merged with my old text based guild's keystone synchronization addon to create this BfA edition).