Forum Discussion
Google Calendar updates marked as Poison.
So we have an issue where an update from a Google Calendar is causing mayhem and ends up causing massive queue delays. This is the second time this occured and I am trying to track down why
First, use the command Set-CalendarProcessing -Identity Conference Room Mailboxes -DeleteNonCalendarItems $false in the Exchange Management Center, and then see if the mail flow rules are not misdiagnosing normal updates as spam.