What is necessary to allow Exchange users to see Google Calendar availability information?

To allow Exchange users to see Google Calendar availability information, it is necessary to configure Google Calendar Interop settings. This process involves establishing a connection between Google Workspace and Microsoft Exchange, enabling seamless sharing of calendar data, including availability and event details. By setting up Google Calendar Interop, you ensure that Exchange users can view the free/busy information from Google Calendar, facilitating better scheduling and collaboration between teams using different platforms.

The other options do not directly address the requirement of sharing calendar availability. Creating a shared Google Drive folder pertains to file storage and collaboration rather than calendar visibility. Enabling Google Groups for sharing involves group email functionalities and permissions, which do not impact calendar availability visibility between Exchange and Google Calendar. Using Google Chat for notifications relates to communication rather than calendar management and sharing functionalities. Thus, configuring Google Calendar Interop is the definitive step needed to achieve the desired visibility.