Appointments/Events have vanished from my Outlook calendar

I'm seeing this as well with my synced Google accounts. I missed an exam and failed a class because it wasn't on my calendar. Turns out, it was when I logged into Google, but I created the calendar item in Outlook in Windows 11 and it disappeared about 15 minutes later. Other items from that same calendar are showing up, but it seems that the Outlook app chooses what to display and what not to display which totally screwed me and now I have to submit an appeal to my school to be able to take my final. Thanks Microsoft.

1. I cannot open my Outlook unless I am online
2. I can only access my calendar when online and it is very slow as it is sending and receiving data from the cloud.

I used to be able to work with a local calendar and can only Outlook even when I am not online. Please help.

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

Vicky:

I'm not sure this is the issue, but I have noticed that any event posted on a shared Outlook calendar that I am the "owner" of that is categorized after being posted is disappearing off my Office 365 calendar, but remains on my Outlook app calendar on my phone, and the desktop calendar as well.

I've now tried adding my own categories, each with a different color, but that simply leaves the event on my Office 365 calendar as a greyed-out event, while the color shows on the desktop and phone app versions of my Outlook calendar.

It is EXTREMELY frustrating, and makes this shared calendar option far less workable.

If you can located the event on a different version of the event, try going to "Event", select "Categorize", and then "Clear All". Right clicking may get you to the same options faster, but see if that resolves your issue until Microsoft can figure out what their coding has screwed up between versions and options.

Good luck!

The issue is notes / meetings / reminders that has vanished from the calendar!!! Does not matter which device or browser l use, the calendar is still missing the info. The cache has been cleared and still the important info is gone

Please focus on the correct issue as the fault finding in not working or retrieving my missing info

I use the OUTLOOK MOBILE APP 99% of the year, the outlook web is only 1% of the time!

I still don't have my info after doing everything that you suggested