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jillian
jillian
Community Member
September 25, 2025

How do I fix Calendly not integrating with Outlook?

  • September 25, 2025
  • 0 replies
  • 1350 views

Scenario / Question

Calendly isn't integrating with my Outlook calendar. Events aren't blocking off my availability or adding to my Outlook. How do I fix this?

Overview

Most Outlook issues come down to either an incorrect calendar connection or how busy/free status is set. Calendly only treats events marked Busy on your connected calendars as conflicts, and will book over events marked Free. If events aren't adding to Outlook at all, disconnect and reconnect your Outlook/Office 365 calendar from Calendar settings and choose the correct calendars to check for conflicts and to add new events to.

Step-by-Step

  1. Confirm your availability setup: Make sure your Availability Schedules in Calendly reflect when you want to be bookable. Calendly shows availability based on these schedules and your calendar conflicts.
  2. Verify your calendar connection: Go to Availability → Calendar settings. Confirm you're connected to the correct provider (Office 365/Outlook.com or Outlook via plugin/Exchange). If in doubt, disconnect and reconnect.
  3. Choose calendars to check for conflicts: In Calendar settings, go to Calendars to check for conflicts and select the Outlook calendars and sub-calendars that should block availability. You can select up to 4 sub-calendars. Calendly only blocks times for events marked Busy (and, by default, Tentative, Away/Out of Office, or Working Elsewhere) on the calendars you select here.
  4. Ensure events are marked Busy in Outlook: Open example events in Outlook and confirm their Show As status is set to Busy. Free events will not block availability and can be booked over. Update any all-day or multi-day items to Busy if they should block time.
  5. Set where new bookings are added: In Calendar settings, select the single calendar under Calendar to add events to. Calendly can only publish to one connected calendar at a time.
  6. Re-test booking: Use your booking link to schedule a test. Confirm the time is removed from your booking page and that the event appears on the selected Outlook calendar and under Scheduled Events in Calendly.
  7. If using the Outlook desktop plug-in: Ensure the plug-in is installed, running on your Windows computer, and set to real-time sync. The plug-in must be running and your device online to sync. If it's not needed, prefer connecting directly to Office 365/Outlook.com for more reliable, real-time syncing.

Key Notes & Limitations

  • Calendly only blocks times for events marked Busy (and, by default, Tentative, Away/Out of Office, or Working Elsewhere) on calendars selected under Calendars to check for conflicts. Free events do not block availability.
  • You can publish new Calendly events to only one connected calendar at a time. Choose the correct destination under Calendar to add events to in Calendar settings.
  • Outlook "Free" holds or FYIs will not block time. Tentative items block time by default; you can change this in the What's considered unavailable? dropdown in Calendar settings. Update Free items to Busy if you need those times protected.
  • If your Outlook add-in/plugin or calendar connection is unstable, connecting via Office 365/Outlook.com is generally more seamless and reliable than the Windows desktop plug-in.

Related Questions (FAQ)

Q: Calendly shows me available even when I have Outlook events at that time. Why?

A: Check that those events are marked Busy and that the specific calendars containing those events are selected under Calendars to check for conflicts in Calendar settings.

Q: Can Calendly read "Free" Outlook events and show them as open slots automatically?

A: No. Availability is controlled by your Calendly Availability Schedules. Calendly only reads Busy events to remove times within your set availability.

Q: My bookings aren't appearing on my Outlook calendar. What should I do?

A: Disconnect and reconnect your Outlook/Office 365 calendar, then choose the single calendar under Calendar to add events to. Re-test after reconnecting.

 

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