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2026.01.24 10:47

To fix the issue, please try each of the following solutions in order. Remember, the repair process may take some time, especially for accounts with large amounts of data. Use the OST Integrity Check Tool (Scanost.exe) to check your .ost file for inconsistencies. When these symptoms occur, or you have other problems synchronizing, the problem might be a corrupted .ost file. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. You can check the error message to find the cause behind the sync issue and fix it.

For teams looking to enhance their calendar management further, the Virto Calendar App for Microsoft 365 & Microsoft Teams offers a powerful alternative. 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. It’s worth noting that sometimes, what appears to be a sync issue might actually be a delay.
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. For both systems, after making changes, restart Outlook to ensure the new settings take effect. Microsoft 365 account recovery help If you’re using an IMAP or POP account, some of these options may not be available, and you might need to check your account-specific sync settings. 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. Calendar syncing plays a pivotal role in maintaining an organized and efficient schedule. Whether you’re managing personal appointments or coordinating team meetings, a synchronized calendar ensures that everyone is on the same page, literally and figuratively.

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. If you’re using a shared calendar, ask the owner to re-share it with you, as sometimes permissions can become corrupted.

You can experience sync issues in Outlook due to poor or no network connectivity. So, first check if your internet connection is stable and working properly. If the connection is slow or inconsistent, you can restart the router or contact your internet provider/IT admin for help. Sometimes an error appears in the Mail and Calendar apps when the apps try to sync new email or calendar events. By leveraging these features, teams can significantly reduce the occurrence of sync issues and improve overall calendar management efficiency. Shared calendars in Outlook are a powerful tool for team collaboration, but they can sometimes encounter sync issues.
Network hiccups or server problems can also disrupt the smooth flow of calendar data, leading to inconsistencies across different users’ views. When multiple users make changes to the calendar simultaneously, conflicts can occur. The OST Integrity Check Tool runs only on .ost files and can be used to diagnose and repair synchronization issues. It scans your local copy of the .ost file and your mailbox on an Exchange Server.