How to connect a Microsoft 365 shared mailbox calendar to Calendly

This article explains how to use a shared mailbox's calendar with Calendly, for conflict checking or as the calendar where new events are added. Use these steps if you need Calendly to read or add events to a Microsoft 365 shared mailbox calendar instead of your personal calendar.

Requirements for connecting a shared mailbox calendar

Before you begin, make sure you have:

• Delegate (Can Edit) permissions on the shared mailbox calendar
• Your own Microsoft 365 credentials to sign in to Calendly (you can't log in as the shared mailbox directly)
• The shared calendar added to your own Microsoft 365 account first (each team member who wants to use it must do this individually)

How to connect a Microsoft 365 shared mailbox calendar

1. In Outlook or Outlook on the web, add the shared mailbox calendar so it appears alongside your own calendars.
2. In Calendly, go to Settings → Scheduling → Calendars and connect your Microsoft 365 account.
3. Under Calendars to check for conflicts and/or Calendar to add events to, select the shared calendar you added.
4. Create a test event type and preview its availability to confirm Calendly can read busy times from the shared calendar.
5. Book a test event and confirm it lands on the shared calendar you selected.

What happens after you connect the shared calendar

Once connected, the shared calendar appears as an option in Calendly's calendar settings. Calendly can then check it for conflicts and add new bookings to it, just like a personal calendar.

Frequently asked questions