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Add Microsoft Outlook Sync Issue After Office 365 Update Microsoft Q&A

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Content<br>
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. Windows Defender Security Center is free security software that's included with Windows 10. If you haven't installed alternative security software, you should temporarily turn off Windows Defender Security Center. Test other [clear Outlook credentials manager](http://mtthub.org/groups/how-to-repair-outlook-data-file-pst-in-simplest-ways/) programs or websites to be sure Outlook is the only problem.
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 [Troubleshoot Office 365 Sync and Login Issues](https://gitlab.innive.com/bethsteffen882) 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
If users are facing syncing issues in Outlook due to corrupt Outlook data files, they must choose a professional tool, like Shoviv OST to PST Converter Tool.Two-factor authentication helps protect your account by making it more difficult for someone else to sign in.After performing these steps, Outlook’s all folders will be synced to the server.The Mail and Calendar apps for Windows 10 don't support two-factor authentication.Moreover, it maintains the folder hierarchy and metaproperties of the data when processing Outlook data files.This can happen for days at a time, and then disappear for a day or 2, only to appear again.
When the user is signed into their mobile app, webmail, or the [Troubleshoot Office 365 Sync and Login Issues](https://links.gtanet.com.br/elanabuford8) Windows Mail app, they are able to receive email perfectly fine with those. The issue is occurring only in the Outlook program installed on Windows. To update from Azure AD Sync to Microsoft Entra Connect, see the upgrade instructions.
Methods to fix Microsoft Outlook syncing error
In some cases setting up a new computer replacement was the only option to fix these odd Outlook Sync issues. Outlook’s ability to connect to the mail server may be blocked by firewalls or antivirus software. After you’re satisfied, turn off your firewall or antivirus program for a while. If it does, you might need to include Outlook exceptions in the settings of your security program. Users can also convert OST files into various file formats, including PST, HTML, EML, MSG, vCard, etc.
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.