Exchange Calendar Item lookup

Calendar Diagnostic Logs are useful for doing things like seeing when an appt was added to a calendar.
Get-CalendarDiagnosticObjects (ExchangePowerShell) | Microsoft Learn

1. Connect to PowerShell: Connect-ExchangeOnline -UserPrincipleName xxx@xxx.com
2. Exampe:
   Get-CalendarDiagnosticObjects -Identity “<first name> <last name>” -StartDate 1/1/1900 -ResultSize Unlimited -ShouldBindToItem $true | Export-Csv “C:\Users\<username>\path\PowerShellSearchResults.csv”
3. Caution: This may not return the item you’re looking for.
4. But you can sort this log file by SubjectProperty and search it and if you find the item do another search:
   Get-CalendarDiagnosticObjects -Identity “<first name> <last name>” -Subject “<string>” to see all records for that matching subject.
5. To see when the calendar item was created, look for CalendarLogTriggerAction = Create.
6. Exchange keeps time in 24hr UTC so subtract 7hrs for PST time zone.