Microsoft Calendar Events Vanished: Troubleshoot & Recover

Victoria Jul 07, 2026

Have you ever logged into your Microsoft Calendar, only to find that some of your events have disappeared? It can be frustrating, especially if those events were important. Don't worry, you're not alone, and there are several reasons why this might happen. Let's dive into the possible causes and solutions for your missing Microsoft Calendar events.

An overview of the Calendar Options in SharePoint and Microsoft 365 | SharePoint Maven
An overview of the Calendar Options in SharePoint and Microsoft 365 | SharePoint Maven

Before we troubleshoot, it's important to note that Microsoft Calendar syncs events across your devices and the cloud. So, if you've recently changed devices or updated your settings, this could be the cause of your missing events. Let's explore the most common reasons and how to fix them.

an image of a calendar with the date circled in blue and arrows pointing to it
an image of a calendar with the date circled in blue and arrows pointing to it

Syncing Issues

One of the most common reasons for missing events is syncing issues between your devices and the cloud. This can happen due to a variety of reasons, such as poor internet connection, outdated apps, or conflicts with other software.

How to create a shared calendar in Microsoft Teams
How to create a shared calendar in Microsoft Teams

To resolve syncing issues, ensure that your devices are connected to the internet and that your Microsoft Calendar app is up-to-date. You can also try force-closing the app and reopening it, or restarting your device to refresh the connection.

Check Your Calendar Settings

How to Create Year and School Calendar with Dynamic Date Markers » The Spreadsheet Page
How to Create Year and School Calendar with Dynamic Date Markers » The Spreadsheet Page

Sometimes, events can disappear if they're not set to sync with your device. To ensure that all your events are synced, go to your Calendar settings and check that the 'Sync events' option is enabled. You can also try toggling this setting off and then on again to force a sync.

Additionally, make sure that the calendar where your missing event was located is still visible and not hidden. You can check this in the 'Calendar view' settings.

Check for Conflicts with Other Software

Announcing Microsoft Lists - Your smart information tracking app in Microsoft 365
Announcing Microsoft Lists - Your smart information tracking app in Microsoft 365

Certain third-party apps or plugins can interfere with Microsoft Calendar and cause events to disappear. If you've recently installed new software, try uninstalling it temporarily to see if that resolves the issue.

Similarly, if you're using a shared calendar, ensure that the person sharing the calendar hasn't accidentally deleted the event or changed the permissions.

Corrupted Calendar Data

a blue and white photo with the words outlook calendar 25 tips & tricks on it
a blue and white photo with the words outlook calendar 25 tips & tricks on it

In some cases, the data stored in your Microsoft Calendar can become corrupted, leading to events disappearing. This can happen due to a variety of reasons, such as software bugs or hardware issues.

To fix corrupted calendar data, try exporting your calendar to an .ics file, then importing it back into your calendar. This can often resolve data corruption issues. Here's how:

Calendar Blocking in Outlook and How This Can Help You Stay Sane
Calendar Blocking in Outlook and How This Can Help You Stay Sane
Inviting a SharePoint Calendar to a meeting
Inviting a SharePoint Calendar to a meeting
How to create a Shared Calendar in Outlook
How to create a Shared Calendar in Outlook
Master Your Schedule with Microsoft 360’s Calendar
Master Your Schedule with Microsoft 360’s Calendar
The 7 Best Calendar Apps in the Microsoft Store
The 7 Best Calendar Apps in the Microsoft Store
Microsoft Removes Legacy Calendar in Teams, New Calendar Now Mandatory
Microsoft Removes Legacy Calendar in Teams, New Calendar Now Mandatory
Benefits of Using Outlook Calendar Invite Templates
Benefits of Using Outlook Calendar Invite Templates
Assign a color category to a calendar event in Outlook
Assign a color category to a calendar event in Outlook
Using Curtains in Microsoft Project to Show What Work is Being Done Within a Sprint
Using Curtains in Microsoft Project to Show What Work is Being Done Within a Sprint
Microsoft’s new Outlook calendar board view looks a lot like Trello
Microsoft’s new Outlook calendar board view looks a lot like Trello
Learn How To Add a Calendar to a Team in Microsoft Teams
Learn How To Add a Calendar to a Team in Microsoft Teams
how to create a shared calendar in microsoft teams
how to create a shared calendar in microsoft teams
Best Calendar Ideas
Best Calendar Ideas
Outlook
Outlook
📆 Outlook Calendar Tips & Tricks
📆 Outlook Calendar Tips & Tricks
How to Set Out of Office in Microsoft Outlook Calendar on Windows and macOS
How to Set Out of Office in Microsoft Outlook Calendar on Windows and macOS
Color-Code Events on a SharePoint Calendar | PremierPoint Solutions
Color-Code Events on a SharePoint Calendar | PremierPoint Solutions
Create a Calendar in Microsoft Excel or Insert a Reference Calendar
Create a Calendar in Microsoft Excel or Insert a Reference Calendar
5 Best Calendar Apps for Windows PC
5 Best Calendar Apps for Windows PC
Microsoft Project Calendar Detailed Work Hours
Microsoft Project Calendar Detailed Work Hours
  • Click on the 'Settings' icon (gear icon) in the top-right corner of your calendar.
  • Select 'Import/export' from the left-hand menu.
  • Choose 'Export' and select the calendar you want to export.
  • Once the .ics file has downloaded, click on 'Import' and select the .ics file to import your calendar back into Microsoft Calendar.

If exporting and importing your calendar doesn't work, you might need to contact Microsoft Support for further assistance.

Remember, prevention is always better than cure. Regularly backing up your calendar data can help you avoid losing important events in the future. You can do this by exporting your calendar to an .ics file and storing it in a safe place.

In conclusion, while missing Microsoft Calendar events can be frustrating, there are several steps you can take to troubleshoot and resolve the issue. From checking your sync settings to exporting and importing your calendar, there's always a solution to be found. Happy calendaring!