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Viewing Exchange free/busy calendar data in Google Calendar

From February 28, 2018, the classic Calendar Interop tool will not be available. You can use the new Calendar Interop tool instead. Learn about the new Calendar Interop tool.
Please read configuring Calendar Interop if you're looking for configuration instructions.

Once you've entered your Exchange server credentials into your Admin console, your G Suite users will see the option to Refresh all in the Find a time feature of Google Calendar. Clicking Refresh all will prompt Google to query your Exchange server for the free/busy calendar data of all users invited to a particular event. If Google realizes that one of the invited users is not a G Suite user, it will query the Exchange server for that user's calendar data.

When Google queries your Exchange server for calendar data, it uses the Exchange Web Services (EWS) protocol and targets the Exchange Web Services URL you entered in your Admin console.

How often does Google query my Exchange server for calendar data?

Google queries your Exchange server whenever a Google Calendar user in your domain clicks Refresh all in the Find a time feature of Google Calendar. Because the query is made on demand, any Exchange calendar data that appears in Google Calendar will be up-to-date.

Viewing Exchange f/b data in Google Calendar, step-by-step

Please read configuring classic Calendar Interop if you're looking for complete classic Calendar Interop configuration instructions. The instructions below only cover viewing Exchange f/b data in Google Calendar.

  1. Login to your Admin console and navigate to G Suite > Calendar > Calendar interop management
  2. Add your Exchange Web Services URL and the username/password of your Exchange Role Account
  3. Check the Enable Server Version of Free Busy Sync box
  4. Click Save changes
  5. Login to Google Calendar
  6. Create a new event and add an Exchange user as a guest
  7. Click Find a time and then click Refresh all to prompt Google to query your Exchange server for free/busy data
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