> For the complete documentation index, see [llms.txt](https://docs.accessia.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.accessia.com/setting-access/booking-based-access.md).

# Booking-based access

## **Booking-based access basics**

You can allow access to a meeting room based on bookings in that room’s calendar. This feature currently supports Microsoft 365 room resource calendars.

With booking-based access, a room still has an access schedule (see [Setting access](/setting-access/access-schedule-basics.md)) but the schedule is overridden when there is a booking, allowing access only to users on the booking invite.

Users and groups in **Access when locked or booked** section of the access schedule retain access during a booking.

## **Set up booking-based access**

Accessia can read bookings from a Microsoft 365 room calendar.

1. Make sure the Microsoft Entra ID integration is set up
   1. Booking-based access specifically requires the Microsoft Graph Application Permissions for *Calendars.Read* and *Place.Read.All*
2. In Accessia, under **Site setup**, click the meeting room that you want to apply booking-based to
3. Go to the **Integrations** tab
4. Click the edit pencil to select the name of the corresponding meeting room from Microsoft

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