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So, follow the below Outlook stuck updating folders solution steps to reset Microsoft Outlook settings. After the files get repaired, restart the Outlook program to ensure that the Outlook syncing issues are resolved or not. Outlook sync issues can be because of corrupted Outlook OST or PST files. Therefore, now we will know the steps to repair the Outlook data file.

Method 4: Recreating the Outlook Profile

However once I joined this computer back to the domain and let it sit for a few days it was also working fine. Once the client started using Outlook again after some time has passed the issue had come back. I’ve tried to set cache mode from 1 year all the way down to a few days. If your password isn't the problem, you might have a certificate error. If so, you'll see a message that says, "There is a problem with the server's security certificate. The security certificate Office 365 sync problems and login fixes is not from a trusted certifying authority."

Check the connectivity to your email server

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.Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.If two-factor authentication is turned on for your account, you'll need to create an app password for that account.It verifies your identity using your password and a contact method (also known as security info).If you are still facing this issue, kindly follow the solutions below to fix the sync issues in Outlook.Incorrect Outlook settings can also be one of the reasons behind Outlook synchronization errors.

You'll also receive a mail (to the alternate email and to your admin email) from Microsoft Fix Outlook Not Opening After Windows Update 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

I ran the PSTscan tool to check for anomalies on the OST file (which it found and repaired but the issue still occurs). However, with one particular client no matter what changes are made these sync issue still occur. We're sorry you're having problems with the Mail and Calendar apps for Windows 10. To fix the issue, please try each of the following solutions in order.

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.