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I found myself with a situation where a meeting organiser sent out a meeting requesting to the whole company. The organizer then wanted to cancel the meeting and found that the meeting had mysteriously disappeared from the calendar. Invitees were still accepting and declining the meeting. We had to improvise to cancel the meeting.

The steps outlined here assumes that you still have a copy of the meeting invite which was originally sent out to the attendees.

You can download a copy of MFCMAPI from this location "https://github.com/stephenegriffin/mfcmapi/releases"

2. Go to Session->Logon and Display Store Table
3. Select your profile (Ensure Outlook profile is configured in online mode)
4. Select Mailbox
5. Expand "Root Container"
6. Expand "Top of Information Store"
7.Double click "Sent Items" and select the problematic meeting request.
8. Right click on the problematic meeting request and select “Copy Messages”
9. Go back to "Top of Information Store" select "Calendar" double click on it
10. Right click and choose “paste messages”

11. Select the Problematic message which you pasted,
12. On the pane below for properties of this message, Select  the “PR_Message_Class” (You find this on the column Other Names)

13. Right Click the Property and  choose Edit and

14. Change the Property from IPM.Schedule.Meeting.Request to IPM.Appointment

15. On column "Named Prop name" find item with name of 0x8217

16. Right Click the item and change the value to 1 from 3

You are done. The item is now in your calendar and you shoulld be able to view or ammend it.


Today i got this is error

The attempt to connect to http://myserver.mydomain.corp/Powershell user ‘Kerberos’ authentication failed: Connecting to remote server failed with the following error message: The WS-Management service cannot process the request. The system load quota of 1000 requests per 2 seconds has been exceeded. Send future requests at a slower rate or raise the quota for this user. The next request from this user will not be approved for at least X milliseconds.


After googling around i found that all i needed was to ru iisreset, and the problem went away. I will be keeping an eye on this.

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