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Remove-CalendarEvents

Use the Remove-CalendarEvents cmdlet to cancel future meetings in user or resource mailboxes. Exchange PowerShell reference

From the Exchange PowerShell reference 8 parameters Its page in the reference

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Parameters

8 in the Exchange PowerShell reference
-IdentityThe Identity parameter specifies the mailbox that you want to modify.
-QueryWindowInDaysThe QueryWindowInDays parameter specifies the number of days after the QueryStartDate parameter value to look for meetings that you want to cancel.
-CancelOrganizedMeetingsThe CancelOrganizedMeetings switch specifies whether to cancel meetings in the mailbox.
-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.
-PreviewOnlyThe PreviewOnly switch specifies whether to preview the results of the command without actually cancelling any meetings.
-QueryStartDateThe QueryStartDate parameter specifies the start date to look for meetings that you want to cancel.
-UseCustomRouting
-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.