Fix Outlook Calendar Disappeared After Signing into OneDrive
Question details
The user's Outlook calendar data is missing or no longer visible after signing into Microsoft OneDrive.
- Product
- Microsoft Outlook
- Device & OS
- not provided
- Scenario
- Signing into a OneDrive account on a PC causes the local Outlook application's calendar data to disappear.
- Observed behavior
- Calendar entries and events are entirely missing from the Outlook PC application interface after the OneDrive login.
Make sure you have your Microsoft account login credentials handy and a stable internet connection, as you will need them to access the web version of Outlook for troubleshooting.
Verify Calendar Data on Outlook on the Web
Checking the web version helps determine if the issue is a local application sync failure or a network/account issue.
By logging into Outlook via a web browser, you bypass the local PC application entirely. If your calendar data is visible online, it confirms that your data is safe on the server and the issue is restricted to the local Outlook desktop application.
Open your preferred web browser and navigate to outlook.live.com or your organization's Microsoft 365 portal.
Log in using the exact same Microsoft account credentials that you use for your Outlook PC application.
Click on the Calendar icon on the left-hand navigation pane to see if your events and appointments are visible.
Repair or Re-add the Email Account in Outlook PC
If your calendar is visible online but missing locally, refreshing your account configuration forces a new synchronization.
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Frequently Asked Questions
Why did signing into OneDrive affect my Outlook calendar?
Signing into OneDrive can sometimes alter the default Microsoft account synchronization settings or profile configurations on your PC. If Outlook and OneDrive are using conflicting account credentials, the local Outlook app may temporarily fail to sync the correct calendar data file (OST).
How do I manually force Outlook to sync my calendar?
In the Outlook PC application, go to the 'Send/Receive' tab on the ribbon and click 'Send/Receive All Folders'. Alternatively, you can click 'Update Folder' while viewing your calendar to force a synchronization with the server.
Where is my local Outlook calendar data stored?
For Exchange and Outlook.com accounts, your calendar is stored on the server and cached locally in an OST file. You can find this file by going to File > Account Settings > Account Settings, clicking the 'Data Files' tab, and selecting 'Open File Location'.
