From looking at the log messages my suspicion is that the authentication token in use contains characters that are being too strongly validated by emClient and rejected. Sometimes the token will not contain these characters and be accepted. If repair didn’t fix the error, you should uninstall Outlook and do a fresh install. In the Send/Receive Settings – All Accounts window, ensure that the Calendar checkbox is checked. If you’re not an admin, ask your IT department to check this for you.

Check Network and Internet Connectivity

Understanding these aspects of shared calendar syncing can help users anticipate potential issues and take steps to minimize conflicts. This article is part of our comprehensive series on synchronization issues, designed to help you navigate the sometimes tricky waters of digital calendar management. Here, we’ll focus specifically on troubleshooting Outlook calendar sync problems, exploring common causes and providing quick, effective solutions to get your schedule back on track. 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. While Outlook provides robust calendar features, integrating additional tools can significantly enhance your scheduling experience.

Troubleshooting steps for Microsoft Outlook calendar not syncing

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. Before you begin, make sure that your device has the latest operating system and app updates. Try the general troubleshooting solutions in Troubleshooting Mail and Calendar apps for Windows 10. For teams looking to enhance their calendar management further, the Virto Calendar App for Microsoft 365 & Microsoft Teams offers a powerful alternative. For both systems, after making changes, restart Outlook to ensure the new settings take effect.

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• In this guide, you will learn the reasons why shared calendars are not syncing with Outlook and the solutions to troubleshoot and resolve the issue.
• 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.
• 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.

Remove your account and add it again using advanced setup

If problems persist, consider reaching out to Microsoft Support or your organization’s IT department for more advanced outdoor signs for business troubleshooting. A problematic OST file can also cause shared calendar synchronization problems. This happens because an inconsistent OST file fails to save the calendar data properly. On restarting, Outlook should download and synchronize all mail items, and you should see the updated shared calendar. Below are the common reasons behind the shared calendar synchronization issues.

Solution 5: Clear RoamCache Files

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.