This is due to the Exchange CalendarRepair
This happens when the user who left is the meeting organiser
You can disable this per use via :
Set-mailbox <User> -CalendarRepairDisabled $true
This is due to the Exchange CalendarRepair
This happens when the user who left is the meeting organiser
You can disable this per use via :
Set-mailbox <User> -CalendarRepairDisabled $true