The product does not report on changes to Calendar

The Calendar folder is excluded from auditing by default, because users often share their calendars. Access to a shared mailbox folder by non-owners will be qualified as unauthorized non-owner access to the mailbox by the product.

If you still want to monitor the Calendar folder, do the following:

1. Navigate to the Netwrix Non-Owner Mailbox Access Reporter for Exchange installation directory.
2. Open the mailboxestoexclude.txt file and delete the */calendar* line.
3. Save the changes.