Outlook Keep Getting Warnings Certificates Error: Step-by-Step Fixes

When Office stops working as expected, start with the shortest official checks before you reinstall anything.

Problem Description: Keep Getting Warnings Certificates

I tried to download a second email in outlook and am now having constant pop-ups about warning certificates from trusted sites. I deleted the 2nd email and still having issues after restarting computer.

Quick Answer for Office Setup on New Device

Close Outlook completely and open the Windows Control Panel to access the Mail settings.

Likely Causes Behind Security Policy Errors Root Factors

• The Microsoft account or license context may not match the purchase or device.

• Cached credentials, outdated builds, or damaged local components can trigger security policy errors.

• A file-specific corruption or add-in conflict can mimic a broader application failure.

Recommended Solution: Transferring Office License Safely

When to use this: Apply these steps when the symptoms match and you can access the relevant Microsoft account or administrator.

1. Navigate to the Email Accounts section and inspect both the Email and Data Files tabs for any lingering configurations belonging to previously deleted accounts.

2. Remove any outdated entries that reference the old email address.

3. If certificate warnings continue, return to the Mail settings, select Show Profiles, and create a fresh Outlook profile.

4. Add only your current primary email account to this new profile to purge cached Autodiscover information and force a clean connection handshake.

5. Launch Outlook with the newly created profile to verify that the certificate warnings have been resolved.

Alternative Solutions for Secondary Security Fixes

1. Retry the Microsoft-side steps after restarting the app and device.

2. Test the same action in a private browser session or a new blank file to isolate account vs file issues.

3. Capture exact error text and screenshots before contacting Microsoft Support or your administrator.

Working with WPS Office: WPS as a Local Alternative

WPS Office cannot replace Microsoft account, activation, or cloud fixes for this scenario. It remains one of the best free Microsoft Office-compatible alternatives for opening and editing local files.

1. Download and install WPS Office from the official website.

2. Open local Word, Excel, PowerPoint, or PDF files in the matching WPS app.

3. Save a working copy locally while Microsoft-side issues are resolved.

4. Return to Microsoft Office after the primary fix succeeds.

If you need a practical local workspace in the meantime, try WPS Office.

Prevention Tips for Keeping Office Stable Long Term

• Keep one primary Microsoft account for subscriptions and Office sign-in.

• Install updates for Office and Windows before retrying failed workflows.

• Back up important files before repair, reset, or reinstall actions.

• Review connected devices and sign-in activity regularly.

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FAQs About Office Support Questions

Can WPS Office fix this security policy errors issue directly? Only when the WPS steps match the formatting or file task. Account, activation, and cloud issues stay on the Microsoft side.

Should I reinstall Office before trying these steps? Not first. Confirm account, license, and the exact error before reinstalling.

What should I send to Microsoft Support? The affected account email, device type, Office version, exact error text, and screenshots with personal data hidden.