Meetings Disappear from Office 365/SharePoint Calendars

[clausanclbe8]

As the IT Manager of a company using Microsoft Office 365 for our staff, we've encountered a concerning issue. Numerous employees have reported that scheduled meetings are inexplicably disappearing from their calendars, often right before the meetings are set to occur. This problem spans across various platforms, impacting users on Windows, Mac, and mobile versions of Office 365/SharePoint. Could you provide guidance on troubleshooting steps to address this issue? Your assistance is greatly appreciated.