
If you’re not an admin, ask your IT department to check this for you.
Access levels and their impact on calendar not syncing Outlook
Why do I keep getting a sync error on my calendar?
Try the general troubleshooting solutions in Troubleshooting Mail and Calendar apps for Windows 10. All of my users use Outlook on the Web in Chrome.for one day -using incognito mode solved the mail won’t send message. After confirming synchronization is not working, follow the solutions discussed below to troubleshoot the issue. Remember, changes to these settings might require you to restart Outlook or even your computer to take effect. Always ensure you have a backup of your data before making significant changes to your email configuration.
Check the connectivity to your email server
It can be time-consuming but is sometimes necessary to resolve persistent issues. Further, you can check the Sync Issues folder in the Outlook navigation pane to find the reason behind the calendar synchronization issue. For
Help from FixTechGuide both systems, after making changes, restart Outlook to ensure the new settings take effect.

Solutions to Fix the Shared Calendar not Syncing issue with Outlook
In the following sections, we’ll dive into specific solutions to get your Outlook calendar syncing smoothly again. The Virto Calendar App for Microsoft 365 & Microsoft Teams is a powerful calendar management solution designed to enhance team collaboration and streamline scheduling processes. This app bridges the gap between various Microsoft 365 apps, providing a seamless calendar syncing experience that significantly improves team planning and coordination.
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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.
- If you still can't sync your email after removing your account and adding it again, you might need to add the account using advanced setup.
- Check your send/receive settings to make sure Outlook is set to update frequently enough.
- If none of these steps work, consider clearing your Outlook cache or running the calendar repair tool to fix any underlying data issues.
- 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.
Remember, patience is key when dealing with shared calendar sync issues. Some changes may take time to propagate across all users and devices. Understanding these aspects of shared calendar syncing can help users anticipate potential issues and take steps to minimize conflicts. Remember, identifying the root cause is the first step to resolving your sync issues.