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. The most common cause of an out-of-date account is an incorrect password. 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.


How to Improve Outlook Calendar Experience with Virto Calendar App for Microsoft 365 & Microsoft Teams

If the issue is resolved, it indicates that your antivirus software or Firewall is interfering with Outlook. Outlook calendar synchronization ensures that your schedule remains up-to-date across all your devices and platforms. Unfortunately, sync issues are more common than one might expect, leading to missed appointments, scheduling conflicts, and unnecessary stress.

If these methods do not resolve the issue, we recommend that you rebuild the .ost file.When these symptoms occur, or you have other problems synchronizing, the problem might be a corrupted .ost file.This app bridges the gap between various Microsoft 365 apps, providing a seamless calendar syncing experience that significantly improves team planning and coordination.You can easily search for the missing items, select them, and save them in PST and other file formats, such as MSG, EML, RTF, HTML and PDF.This article is part of our comprehensive series on synchronization issues, designed to help you navigate the sometimes tricky waters of digital calendar management.You can check the error message to find the cause behind the sync issue and fix it.If none of these steps work, consider clearing your Outlook cache or running the calendar repair tool to fix any underlying data issues.
Troubleshooting steps for Microsoft Outlook calendar not syncing

Outlook calendar syncing problems, while frustrating, are usually fixable. Common culprits include incorrect permissions, network or server issues, Microsoft Outlook troubleshooting outdated software, cached data conflicts, and account misconfigurations. Also, be mindful of potential conflicts when multiple users edit shared calendars. The solutions outlined in this article, from simple checks to more advanced fixes, address most of these issues. If your Outlook calendar is not updating with meetings, it could be due to several reasons. First, ensure you have the necessary permissions to view and edit the calendar in question.


Check advanced mailbox settings

When synchronization issues occur in Microsoft Outlook or in Microsoft Outlook Web App (formerly Outlook Web Access), you may experience the following symptoms. Now, manually sync your mailbox using the Update Folder button under the Send/Receive tab. Check with your email provider for instructions about how to create an app password for your email account.
Solutions to Fix the Sync Issues in Outlook

Remember, patience is key when dealing with shared calendar sync issues. Remember, identifying the root cause is the first step to resolving your sync issues. In the following sections, we’ll dive into specific solutions to get your Outlook calendar syncing smoothly again. After rebuilding the OST file, it’s important to check for any missing mailbox data. If you find any missing items in the new OST file, you can recover them from the backup OST file using Stellar Converter for OST. This professional OST to PST converter tool can extract data from the backup OST file and convert it into PST file, which you can easily import into Outlook.



The Mail and Calendar apps for Windows 10 don't support two-factor authentication. If two-factor authentication is turned on for your account, you'll need to create an app password for that account. An app password is used instead of your normal account password for apps that don't support two-factor authentication. 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.