In Microsoft Exchange Server 2016 and Exchange Server 2013 on-premises, when you run the Get-CalendarDiagnosticAnalysis cmdlet, the output shows an incorrect end-time for the meeting/appointment. The DateTime value is shown in 12-hour clock format, not in 24-hour clock format.
This issue occurs because the DateTime value uses 12-hour clock format instead of 24-hour clock format.
To fix this issue, install one of the following updates:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Learn about the terminology that Microsoft uses to describe software updates.