Last summer, we announced improvements to Google Calendar Interop for Microsoft Exchange. We simplified the setup process, introduced detailed logs in Admin console, and made free/busy lookups available on mobile as well as web.

To continue enhancing the coexistence of these two systems, we’re rolling out the support for event details in availability lookups. Now, G Suite admins can opt in to sharing event details when users use Calendar's Find a Time or Outlook's Scheduling Assistant. Event details include:

• Event title
• Event location
• Guest’s response status

We have also improved our authentication mechanism recently, paving the way to a simplified Calendar Interop setup in the future. To be able to use the event details feature, you will likely have to regenerate Exchange credentials using the credential generation tool and update your availability address space as explained in steps 3 through 5 here.

For more information on how to enable these new interop features, check out this Help Center article. 

Launch Details
Release track:
Launching to both Rapid Release and Scheduled Release

Editions:
Available to all G Suite editions

Rollout pace:
Full rollout (1–3 days for feature visibility)

Impact:
Admins and all end users

Action:
Admin action suggested/FYI

More Information
Help Center: How Calendar Interop works


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Source: G Suite Updates Blog