Remember, the repair process may take some time, especially for accounts with large amounts of data. Check with your email provider for instructions about how to create an app password for your email account. We're sorry you're having problems with the Mail and Calendar apps for Windows 10.

Solution 8: Repair or Reinstall Outlook (MS Office)

Just add your same account via the automatic account wizard which will setup as an IMAP account. Then once setup and working, drag / move all your existing POP messages and any custom message folders to your new IMAP account. Then once you are certain all your messages are all there, remove your POP account. Now that you have a clearer understanding of the potential causes, let’s explore the step-by-step solutions to address the Outlook Calendar not syncing issue. After confirming synchronization is not working, follow the solutions discussed below to troubleshoot the issue.

Troubleshooting Outlook Calendar Sync Problems: Quick Fixes Inside

By leveraging these features, teams can significantly reduce the occurrence of sync issues and improve overall calendar management efficiency. These advanced troubleshooting steps can often resolve persistent issues that simpler methods can’t fix. However, they should be approached with caution, especially in managed business environments.

Troubleshoot calendar and contacts in the Outlook mobile app

• In this section, we’ll explore how the Virto Calendar App for Microsoft 365 and Microsoft Teams can take your calendar management to the next level.
• If you can sync your email when the firewall is turned off, you'll need to allow the Mail and Calendar apps through the firewall.
• Common culprits include incorrect permissions, network or server issues, outdated software, cached data conflicts, and account misconfigurations.
• Check with your email provider for instructions about how to create an app password for your email account.
• Below are the common reasons behind the shared calendar synchronization issues.
• Lastly, the very nature of collaboration can lead to sync issues.

When your Outlook calendar isn’t syncing properly, it can throw your entire schedule into disarray. This section will guide you through a series of troubleshooting steps to get your calendar back on track, whether you’re using Outlook on your desktop or mobile device. Third-party firewalls or antivirus software might prevent you from syncing your email and calendar events. Check the software documentation to learn how to temporarily turn it off. Firewalls and antivirus software might prevent you from syncing your email and calendar events.

Re-add account

Shared calendars in Outlook are a powerful tool for team collaboration, but they can sometimes encounter sync issues. Understanding why these problems occur is the first step in resolving them. If you're using Microsoft 365 login troubleshooting an Exchange account that requires advanced settings, you'll need to remove the account and add it again using advanced settings. To add the account using advanced settings, see Add an account using advanced setup. Once you have a stable and consistent network connection, you can go ahead and follow the other advanced troubleshooting solutions.

Why has my calendar stopped syncing?

You’ll need to update your third-party mail and calendar app to a version that supports modern authentication. Accumulated cache and temporary files can interfere with the Outlook synchronization process and lead to sync errors and issues. If the shared calendar is syncing, then find and remove the faulty add-in to fix the issue permanently.