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This tool also helps users fix Outlook syncing issues by repairing OST or PST files and syncing the data smoothly. There are various methods to resolve the Outlook sync issues, including manual and third-party solutions. Firstly, we will discuss a few manual methods to resolve this repair pst file Without data loss Outlook error and share the stepwise procedure of each method to successfully fix synchronization issues. Now, let us start with the manual processes to fix Outlook syncing errors. I have multiple users experiencing sync errors with Outlook and office365.

Method 4: Recreating the Outlook Profile

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 Outlook Not Sending or Receiving Email 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. Once you have completed the steps to fix Outlook sync errors, kindly check if the error has been fixed or not.

Check the connectivity to your email server

There are various methods to resolve the Outlook sync issues, including manual and third-party solutions.The Support and Recovery Assistant, a tool provided by Microsoft, can identify and resolve common Outlook problems.Below are the steps I’ve taken to try to resolve this issue.Firewalls and antivirus software might prevent you from syncing your email and calendar events.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."This solution will be beneficial for users who are facing Outlook syncing issues because of corrupted PST or OST files.

You'll also receive a mail (to the alternate email and to your admin email) from Microsoft FixTechGuide Office 365 troubleshooting 365 that indicates your tenant has encountered directory synchronization errors. For details see Identify directory synchronization errors in Microsoft 365. I still have it turned on on my laptop and it has not shown any issues yet.

Methods to fix Microsoft Outlook syncing error

If the size of your .ost file is close to the limit, you could try increasing the limit on your client, restart Outlook and see if there is any difference. 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. The client has a computer off the domain at home that his work email is tied to and he has never had any of these issues in Cache mode with that device. I’ve unchecked download shared folders when setting up a new Outlook profile. Check with your email provider for instructions about how to create an app password for your email account. The Mail and Calendar apps for Windows 10 don't support two-factor authentication.

Microsoft Outlook Sync issues

To make sure there are no issues, click Test Account Settings to test the connection. It is possible for a corrupted Outlook profile to impede synchronization. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. If the problems do not occur in safe mode, its most likely an add-in causing grief. I’ve been in contact with Microsoft they had me migrate his account\data to another server this did not fix it.