
If the synchronization starts working, you can remove the old profile from Outlook. By repairing or reinstalling MS Office, you can fix any issue with the Outlook program files that might be damaged, leading to the synchronization issues in the Outlook program. Check if the shared calendar is now syncing properly with Outlook.
Solution 5: Clear RoamCache Files
Why has my calendar stopped syncing?
Outlook calendar syncing problems, while frustrating, are usually fixable. Common culprits include incorrect permissions, network or server issues, outdated software, cached data conflicts, and account misconfigurations. Also, be mindful of potential conflicts when multiple users edit shared calendars.
Solution 6: Clear Offline Items and Verify Calendar Sharing Settings
Once you have a stable and consistent network connection, you can go ahead and follow the other advanced troubleshooting solutions. If you’re using an Outlook.com, Microsoft 365, or Exchange account, you won’t have advanced mailbox settings unless the account was set up using advanced setup. If you still can’t sync your email after removing your account Outlook loading profile fix and adding it again, you might need to add the account using advanced setup. For more information, see Add an account using advanced setup. I’m not seeing calendar issues, but in all fairness, we don’t use the calendar much. I am, however, seeing Outlook not authenticate to my mailbox.

Troubleshooting Outlook Calendar Sync Issues
Below are the common reasons behind the shared calendar synchronization issues. While Outlook provides robust calendar features, integrating additional tools can significantly enhance your scheduling experience. 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. We’ll delve into the benefits of using this powerful app and highlight its features specifically designed to troubleshoot sync issues.
This device doesn’t meet the security requirements set by your email administrator

If so, you’ll see a message that says, “There is a problem with the server’s security certificate. The security certificate is not from a trusted certifying authority.” 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. To fix the issue, please try each of the following solutions in order. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
- By repairing or reinstalling MS Office, you can fix any issue with the Outlook program files that might be damaged, leading to the synchronization issues in the Outlook program.
- Try the general troubleshooting solutions in Troubleshooting Mail and Calendar apps for Windows 10.
- If the shared calendar is syncing, then find and remove the faulty add-in to fix the issue permanently.
- Outlook calendar syncing problems, while frustrating, are usually fixable.
- Windows Defender Security Center is free security software that’s included with Windows 10.
- Check with your email provider for instructions about how to create an app password for your email account.
- Remember, changes to these settings might require you to restart Outlook or even your computer to take effect.
It’s worth noting that sometimes, what appears to be a sync issue might actually be a delay. Outlook doesn’t always sync instantaneously, and there can be a short lag between changes made and their appearance across all devices. If your password isn’t the problem, you might have a certificate error.
by karrymortimer