The most common cause of an out-of-date account is an incorrect password. In the notification bar at the top of the app, select Fix account. If your password is incorrect, you'll see a message asking you to update your password. If you're using 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.

Access levels and their impact on calendar not syncing Outlook

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 Common culprits include incorrect permissions, network or server issues, outdated software, cached data conflicts, and account misconfigurations.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 10: Create a New Profile

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 Step-by-step Office troubleshooting both systems, after making changes, restart Outlook to ensure the new settings take effect.

Why has my calendar stopped syncing?

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.

This device doesn't meet the security requirements set by your email administrator

If you’re using a shared calendar, ask the owner to re-share it with you, as sometimes permissions can become corrupted. Try removing and re-adding the problematic calendar to reset the connection. If none of these steps work, consider clearing your Outlook cache or running the calendar repair tool to fix any underlying data issues. In Outlook, shared calendars allow multiple users to access and update a calendar, schedule events and ensure everyone stays on the same page. However, sometimes due to various issues, you may encounter a situation where your shared calendar fails to sync with Outlook.

• 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.
• Verify that you’re not in offline mode and that your internet connection is stable.
• Whether you’re managing personal appointments or coordinating team meetings, a synchronized calendar ensures that everyone is on the same page, literally and figuratively.
• 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.

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.