Outlook Calendar removed all appointments, except invitee appointments

Question

Outlook Calendar removed all appointments, except invitee appointments

F D 0

Outlook calendar deleted all appointments except for those where I am an invitee. They went missing with no warning and are not on any web, PC or phone based version, not in deleted items or found by re-syncing accounts. Just vanished.

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Answer 1

Jess-Q 10,410 Microsoft External Staff Moderator

Hi @F D

Regarding your issue, may I kindly ask a few questions to help understand it better.

I saw that you posted your question under the Business category so to better support you, would you mind letting me know is this account a personal Microsoft account (e.g., account.microsoft.com) or a work/school account (e.g., myaccount.microsoft.com) provided by an organization?
Is this your main calendar or a shared/delegate calendar
Does this issue happen to other users in your organization, or only your account?
In your Calendar > View, do you have any filter applied?
Did anything change before this (update, new phone, new app)?
Could you provide a screenshot of the issue (make sure to hide your personal information) if possible?

Hope to hear back from you soon. 

The initial response may not fully address your needs, but it will help me better understand your situation. Once I get the information, I will try my best to find the next steps.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

F D 0 Reputation points

2026-05-04T11:17:01.24+00:00

Hi, it is set up by my organisation but as far as I am aware it has not affected others. The calendar is my main calendar not a shared one. I checked the filters and they are turned off so this hasn't changed. Had no updates or change of phone. Half my appointments are still showing just not standalone one off events. Before the calendar had multiple appointments per day but this is what is now showing (image attached).
Jess-Q 10,410 Reputation points Microsoft External Staff Moderator

2026-05-04T14:52:12.6366667+00:00

Hi @F D,

It looks like the screenshot may not have uploaded successfully. Could you please try uploading the image again?
F D 0 Reputation points

2026-05-04T15:22:45.4266667+00:00

[Screenshot_2026-05-04-12-15-57-752_com.google.android.calendar.jpg]
F D 0 Reputation points

2026-05-04T16:10:05.07+00:00

This was also fully populated with multiple entries each day and now this is what is visibleScreenshot_2026-05-04-17-08-53-502_com.google.android.calendar.jpg
Jess-Q 10,410 Reputation points Microsoft External Staff Moderator

2026-05-05T16:20:02.6+00:00
Hi @F D,

Just to make sure I understand your setup correctly I noticed the screenshot looks like it was taken from the Google Calendar app rather than the Microsoft Outlook app.

Could you help clarify how your work calendar is set up on your phone?

Did you add your work email through your phone's account settings and your calendar events started showing up in the Google Calendar app automatically? Or did you install the Microsoft Outlook app separately and use that for your calendar?

Also, when you checked on other devices did you check your calendar via outlook.office.com, or were you checking through Google Calendar in a browser?

Once you confirm, I'll have a much clearer picture of what happened and what can be done.

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Outlook Calendar removed all appointments, except invitee appointments

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