In most organizations, the calendars are private by default. You can open up your own calendar with the rest of the organiazation, if you know how it's done. But this comes from the time when we didn't trust each-other. So it's time to open up.
You can start small by opening up the digital calendars of your own team, or just one department.
When proven successful, it should be fairly easy to open up all calendars. Yes, all, including the ones from management and directors.
The level of trust goes up.
Easier scheduling, because you can see the availability immediately