Calendar Not Syncing
Microsoft Microsoft Outlook
Severity: ModerateWhat Does This Error Mean?
Outlook calendar sync stops when the sync interval is set to manual or the account needs to be re-added. Events from a meeting on your computer won't appear on your phone until sync is working. The fix usually takes under five minutes.
Affected Models
- Microsoft Outlook 2019
- Microsoft 365 Outlook
- Outlook on iOS
- Outlook on Android
Common Causes
- Calendar sync interval is set to manual instead of automatic
- Microsoft Exchange or Microsoft 365 has a temporary service issue
- Outlook mobile app is outdated and needs an update
- Multiple calendars are set up and the wrong calendar is selected
- The Outlook account on your phone needs to be removed and re-added
How to Fix It
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On your phone, open Outlook, go to Settings > your account > Sync Calendar, and make sure it's set to Automatic.
Setting sync to 'Manual' means your calendar only updates when you open the app and pull down to refresh.
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Manually refresh the calendar by pulling down on the calendar screen in the Outlook mobile app.
Sometimes a one-time manual refresh is all it takes to kick the sync back into gear.
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Make sure the correct calendar is visible: in Outlook mobile, tap the three lines (menu), then tap Calendars and check that your main calendar is turned on.
If you have multiple accounts, events may be appearing in a different calendar that isn't currently shown.
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Remove and re-add your account in Outlook mobile: Settings > your account > Delete Account, then add it back.
This forces Outlook to re-sync all calendar data fresh from the server.
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Check Microsoft's service status at status.office.com — if Outlook or Exchange is showing an outage, wait for Microsoft to resolve it.
Service outages are rare but they do happen. You don't need to do anything during an outage — it fixes itself.
When to Call a Professional
Calendar sync issues are something you can fix yourself. All fixes are done in the Outlook app or your phone settings — no IT help needed.
Frequently Asked Questions
Why do my Outlook calendar events show on my computer but not my phone?
Your phone's sync is likely set to manual or the account needs to be refreshed. Go to Outlook Settings on your phone and set calendar sync to Automatic.
How do I force Outlook calendar to sync right now?
In the Outlook mobile app, go to the Calendar tab and pull down from the top of the screen. This triggers an immediate sync with the server.
Will removing my account from Outlook mobile delete my emails?
No — your emails and calendar events are stored on Microsoft's servers, not your phone. Removing and re-adding the account just refreshes the connection.