To sync your Outlook calendar on Windows 10, add your account to the new Outlook for Windows app: open Outlook, go to Settings (the gear icon) > Accounts > Email accounts > Add account, and sign in. Your calendar syncs automatically and stays up to date with Outlook on the web and your phone. If you use the classic Outlook desktop app, your calendar syncs through your email account. Press F9 or click Send/Receive All Folders to force an update.
Microsoft retired the old Windows 10 Mail and Calendar apps at the end of 2024 and replaced them with the new Outlook app, so most older guides no longer apply. Here’s how to sync on Windows 10 today, and how to fix a calendar that isn’t updating.
Method 1: Sync with the new Outlook for Windows
- Open Outlook (new) from the Start menu. If you don’t have it, install Outlook for Windows from the Microsoft Store.
- Sign in with your Outlook.com, Hotmail, Microsoft 365, or other email account.
- To add another account, click the Settings gear > Accounts > Email accounts > Add account.
- Click the Calendar icon on the left. Events from each account appear, and you can turn calendars on or off in the left pane.
The new Outlook also supports Gmail and iCloud accounts, so you can see all your calendars in one place.
Method 2: Sync in classic Outlook (Microsoft 365 or Office)
- Open Outlook and make sure your account is added under File > Account Settings > Account Settings.
- Click the Calendar icon at the bottom or left side.
- Press F9, or click Send / Receive > Send/Receive All Folders, to sync right away.
Outlook.com and Microsoft 365 accounts sync calendars automatically. POP accounts don’t sync calendars at all, so use Exchange, Outlook.com, or IMAP with a calendar service instead.
Method 3: Add another calendar by link (ICS)
- Copy the calendar’s public or secret iCal (.ics) address from the other service, such as Google Calendar’s Settings and sharing page.
- In Outlook on the web or the new Outlook, go to Calendar > Add calendar > Subscribe from web.
- Paste the link, name the calendar, and click Import.
Subscribed calendars are read-only and can take several hours to refresh.
On your phone, see setting up Outlook email on an iPhone.
For task-style alerts, read how to set reminders on Windows 11.
Troubleshooting a calendar that won’t sync
- Check the account in Outlook on the web. Sign in at outlook.com or office.com. If the event isn’t there either, the problem is with the account, not Windows.
- Check your internet connection and time settings. Wrong date, time, or time zone can cause sync errors. Go to Settings > Time & Language and turn on Set time automatically.
- Remove and re-add the account in Outlook.
- Update Outlook through the Microsoft Store (new Outlook) or File > Office Account > Update Options (classic Outlook).
- Shared calendars can take a while to appear. Ask the owner to share it again if it’s missing.
Frequently asked questions
Can I still use the Windows 10 Calendar app?
Microsoft ended support for the Mail and Calendar apps on December 31, 2024. They may stop syncing, so switch to the new Outlook app.
How do I see my Outlook calendar from the taskbar?
Click the clock in the taskbar to see a basic calendar. Older versions of Windows 10 show agenda events there only if the Calendar app is set up.
Does Outlook sync with my iPhone or Android calendar?
Yes. Add the same account in the Outlook mobile app, or in your phone’s Calendar settings.
Kermit Matthews is a freelance writer based in Philadelphia, Pennsylvania with more than a decade of experience writing technology guides. He has a Bachelor’s and Master’s degree in Computer Science and has spent much of his professional career in IT management.
He specializes in writing content about iPhones, Android devices, Microsoft Office, and many other popular applications and devices.