Revnox reads your calendar, read-only, so a prepared reply can offer times you are free and a booked meeting is noticed. It never writes to your calendar. Each person connects their own, because the times a reply offers are that person's.
Open Settings > Calendar and paste your calendar's private iCal link. Where to find it:
The screen shows the same steps next to the field. The link is a secret: once saved, Revnox shows only the host it points to, never the link itself. Where your workspace offers a one-click sign-in for your calendar provider, the screen shows that button as well.
Set the days and hours you take meetings on the same screen, and replies offer times only inside them.