Meeting series disappeared in organizers calender

Sean_Tong,

I had the same issue and I found a way to fix this problem. First I had someone forward the meeting to me, and then while I did not have the option to accept or decline as I was the organiser, I clicked the button to forward the invite and it just appeared in my calendar. (I didn't have to actually forward it to anyone). If someone is able to send you the meeting series, it's better as the past meetings and future meetings will appear too. I'm not sure how this work, but it did for me, so I hope you have some luck as well.

EDIT: I notice this solution makes you appear as an attendee and not the organiser rights to amend or cancel the meeting. It can be fixed by downloading the meeting as an iCalendar (ICS) file, opening it in Notepad (Right click and Open With, selecting Notepad, but don't check the box to always open it in Notepad), and removing your name from the Attendee list. It should still be in the Organiser field, as expected. Save and close the ICS file.

Then, instead of dragging it into Outlook which won't work (it'll open it as a meeting instead, which won't add it to the calendar), you instead have to go to File -> Open/Export -> Import and select the modified ICS file. It'll prompt you to open as a new calendar or use the existing one; choose existing, and it'll pop up in the calendar with you having the organiser rights.

I think it's to do with the fact that clicking Forward adds you to the attendee list despite also being the organiser so the organiser rights are lost when the event is put back in the calendar when you just press Forward.

Kind Regards
Sumble.

Sean_Tong 

Here are some general troubleshooting steps you can try:

1. Refresh your calendar: Sometimes, the disappearance of a meeting series can be due to a temporary synchronization issue. Try refreshing your calendar by closing and reopening it or by syncing it manually to see if the series reappears.
2. Check your deleted items: It's possible that the meeting series was accidentally deleted. Look for the meeting series in your deleted items or trash folder. If you find it there, you can restore it to your calendar.
3. Search for the meeting series: Use the search functionality in your calendar application to look for the specific meeting series. Enter relevant keywords or the names of participants to narrow down the search. It's possible that the meeting series got moved to a different location within your calendar.
4. Check other devices and platforms: If you access your calendar from multiple devices or platforms, such as a smartphone, tablet, or web browser, verify if the meeting series is visible on any of these other platforms. It's possible that it's still present on one of them.
5. Contact your IT support: If you're using an organization-wide calendar system, such as Microsoft Outlook within an enterprise, reach out to your IT support team. They may be able to assist you in recovering the missing meeting series or provide further guidance.
6. Restore from a backup: If you or your organization regularly back up your calendars, there may be a chance to restore the missing meeting series from a backup. Consult your IT support or system administrator for assistance with this process.

Remember to inform your team members about the issue, so they are aware of the potential loss and can help in finding a solution. Additionally, consider creating a new meeting series or scheduling individual meetings to ensure that your team's discussions can continue even if the original series cannot be recovered.

We have a large number of cases where meetings disappear from the atendee's calendar when they accept the meeting and organizer meetings disappear after they send the invitation.

Workaround is accepting the meeting from OWA. No clear solution to recover the organizer meeting, in some cases it helped to have one of the atendees forward the meeting back to the organizer.

This on top of the meeting conflict issue, it's a nightmare.

We have a case open with M$ support.  We were able to do extensive logging and repeat the issue several times for them to have data and a lead to follow.  The Outlook team deemed it an Exchange Online issue.  The Exchange team hasn't responded yet.

Issue:  Organizer creates or modifies a meeting and sends it.  It gets deleted from the organizer's calendar (immediately), or sometimes from the attendee's calendar.

We have ruled out anything we can do with Outlook.  Update, rebuild OST, new Outlook profile, etc.

There is a way to put it back in the Calendar, but nothing to prevent it... SOOOO AGRIVATING!!! 

From MS:

Outlook debug team has analyzed the data collected from Ryan’s PC. Their analysis confirms my initial analysis of the data, we need to understand why the server is throwing this error on frame 922 when “Test13” gets created by Outlook.

Here is a PIA procedure to get the meeting back into the Organizers Calendar.  It is not a fix.

1. Find the missing meeting from someone internal. It doesn’t have to be the Organizer, but if it is, it hopefully is still in their Delete or Sent folder.
2. Forward the meeting to yourself WITHOUT NOTIFICATIONS/ALERTS/UPDATES
3. Tentatively accept the meeting, again WITHOUT NOTIFICATIONS/ALERTS/UPDATES
4. Open Outlook and navigate to the Calendar view.
5. Find the Meeting you want to export.
6. Double-click the Meeting to open it.
7. Go to the "File" Menu: In the meeting window, click on "File" in the top left corner.
8. Save As: Choose "Save As" from the menu options.
9. Select File Type: In the Save As dialog box, select "iCalendar Format (*.ics)" from the "Save as type" dropdown menu.
10. Save the File: Choose the location where you want to save the ICS file, give it a name, and click "Save".
11. Open the ICS file in notepad (or some Editor) so we can make a modification. Change the following text:
12. Find and Replace - METHOD:REQUEST to METHOD:PUBLISH
13. Save the modified ICS file.
14. Copy/Transfer the file to the person missing the meeting.
15. Double-click the ICS file on the user’s computer.
16. Accept the Warning message if one appears.
17. Close the appointment window WITHOUT Accepting or Tentative Response.
18. Outlook will ask if you want to Save, say YES.

We have the same issue on different customers. For every customer there is a subset of about 15% of the users affected. Only Workaround for us was to work in Online Mode. The issues we are seeing are not only Meetings but also simple Calendar Appointments. We have created 6 Appointments the same day. 2 of them get synched to the mailbox and are visible on mobile phone and outook on the web. The remaining 4 appointments disappear and ends up in the local Failures Folder of Synchronization issues. The same also we saw, when users move a mail from their personal inbox to a shared mailbox. The email disappears from the in box, never shows up in the shared mailbox, and again the mail can be found in Local Failures. Next issue. when we Delete mails in the inbox, sometimes they still show up in outlook on the web and the mobile phone as unread. Basically outlook Client does not sync with Mailbox. We discovered also unplugging and replugging the network cable solves the issue for maybe a few hours to 2 days. we tried to create new OST File, new Outlook Profile, New Windows Profile several times, all with no effect.  We also tried to disable antivirus software, disable outlook Add-ins, no changes. Also after a reboot the issue persist. Anyone else experiencing this Issues in Outlook Desktop app with chache mode?