Appointments/Events have vanished from my Outlook calendar

I'm having the same issue and we have been testing. I've literally seen the meeting appear and disappear a minute later.

Here are 2 examples.

Raisa booked a meeting with me (Ashley) and Alicia. We both accepted but the meeting only appears on Alicia's calendar. It was removed from mine and even was removed from Raisa who booked it.

Another example, Alicia booked a meeting with me (Ashley) and Madeline. We both accepted but the meeting disappeared from my calendar.

As we were testing i literally saw it appear, and disappear a moment later.

I have the accepts in my sent mail but what is interesting is it says that it can't find the meeting as it may have been moved or deleted. But the person who booked it made no changes and if it had been moved or deleted why not for all people attending.

The problem is we can't reproduce it with any consistency (hence the tests). It seems to happen totally at random.

I have tested on Outlook.Office.com as well as the "new Outlook" with no difference.

We are on the current channel, version 2405 - Build 17628.20144

Thank you so much for your help. I don't have a shared outlook at all. I've been using this calendar for more than 10y and this is the first time something like this happened. I've now after too many attempts and explanations opted for another calendar altoghter

Hi Vicky Thank you for posting on Microsoft Community. I will be happy to help. I am a user just like you and only trying to advice/ assist in a best possible way I could resolve your issue.

I understand how alarming it is to have your Outlook calendar events, appointments, and notes disappear, especially when they're crucial weekly and monthly updates. I apologies that you are facing this issue, don't worry, we can work together to find the missing data and hopefully restore it. Here are some steps we can take:

1. Check for Visibility Settings:

Filter applied: Ensure no filters are applied that might be hiding your events. Clear any active filters and check if the content reappears. View settings: In your calendar view settings, confirm you're not hiding specific categories or calendars that might contain the missing data. 2. Search:

Search your calendar: Use the Outlook search bar to search for specific keywords or event titles from your lost data. Expand the search scope to all folders if needed. 3. Recover Deleted Items:

Deleted Items folder: Check the "Deleted Items" folder within your Outlook calendar. If your missing data is there, right-click and choose "Restore" to bring it back. Recoverable Items folder: If the data isn't in the Deleted Items folder, try the "Recoverable Items" folder. This hidden folder stores recently deleted items. Access it by: Go to the email folder list in Outlook. Select "Deleted Items." On the "Folder" tab, choose "Recover Deleted Items." Select the missing items and click "Restore Selected Items." 4. Check Sync Issues:

Out-of-sync calendar: If your calendar is synced with other devices or accounts, ensure all sync processes are complete and no errors are present. Try manually triggering a sync. 5. Data File Corruption:

Repair Outlook data file: Use the built-in repair tool for your Outlook data file (PST or OST) to fix potential corruption that might be causing the data loss.

Hope this helps and answer your question. Help the next person who has this issue by indicating if this reply solved your problem. Click Yes or No below. Kind Regards -Adedayo

We are having the same issue as well.

Random meetings are being removed from employee calendars

We have tried:

• Repairing the PST / OST
• Reinstalling Outlook

We have seen it occur with

• Internal Appointments
• External Appointments

We cant replicate the issue and is a major concern for client meetings

I am the meeting organiser but the appointment no longer shows on my calendar meaning that I cannot edit it, but the appointment is on all the invitees calanders.