This ensures Outlook and Windows run the same DLL versions and registry references.

Use Microsoft Support and Recovery Assistant (SaRA)

Go to File → Office troubleshoot Outlook synchronizing folders error Account → Update Options → Update Now. The built-in Auto-Detect Utility ensures complete privacy—your credentials never leave your device. Run a full scan through the dashboard and receive a detailed report on configuration health, certificate status, and network connectivity.

Step 8 – Recreate Your Outlook Profile

• Installing any important, recommended, and optional updates can often correct problems by replacing out-of-date files and fixing vulnerabilities.
• Once the scan completes, reopen Outlook and check if the issue is resolved.
• Go to File → Options → Add-ins → disable all add-ins, then re-enable them one by one to find the faulty one.
• If you recently changed your password or enabled 2-factor authentication, update credentials in Outlook’s account settings.
• Certain antivirus tools inspect SSL ports and block push notifications.

Once back online, Outlook will immediately start syncing your mailbox with the server. It’s better to clear cache, recreate send/receive groups, and reset your profile for faster results. You can start Outlook in safe mode, disable your add-ins, and then try to open Outlook normally.

Why Outlook Fails to Update Until Restart

This solution prevents display rendering errors that occur after driver or DirectX updates. Third-party add-ins are among the most common Fix Outlook and Office 365 Errors 2025 culprits for Outlook not opening properly. Safe Mode allows you to start Outlook with all extensions temporarily disabled. Once the scan completes, reopen Outlook and check if the issue is resolved.

How to Fix Outlook Not Opening on Windows 11

For persistent issues, use FixTechGuide’s automated tools to perform deep diagnostics and security checks. Stay updated, back up regularly, and enjoy uninterrupted productivity in your Outlook workspace. Certain antivirus tools inspect SSL ports and block push notifications.



Delete the existing group and click "New." Name it All Accounts and ensure both "Include this group in send/receive" options are checked. This forces Outlook to refresh all accounts automatically without requiring a restart. Sometimes, aggressive antivirus programs block Outlook’s execution. If Outlook opens, whitelist Fix Outlook Not Opening After Windows Update the Outlook process in your antivirus settings.