There is a problem with the proxy server’s security certificate

It’s possible you’ll obtain the error message There is a problem with the proxy server’s security certificate when Outlook tries to hook up with a server by utilizing an RPC connection or an HTTPS connection. On this put up, we are going to establish the potential causes, in addition to supply the most satisfactory options to resolve this situation.

Once you encounter this situation, you’ll obtain the following full error message;

There is a problem with the proxy server’s security certificate.
The title on the security certificate is invalid or doesn’t match the title of the goal web site webmail.area.com.

Outlook is unable to hook up with the proxy Server. (Error Code 0)

Attainable variants of the error message with accompanying error code when the error happens will be any of the following;

• There is a problem with the proxy server’s security certificate, %s. Outlook is unable to hook up with this server.
• There is a problem with the proxy server’s security certificate, %s. The title on the security certificate is invalid or doesn’t match the title of the web site. Outlook is unable to hook up with this server.
• There is a problem with the proxy server’s security certificate, %s. The security certificate is not from a trusted certifying authority. Outlook is unable to hook up with this server.

Based on Microsoft documentation, this situation might happen if a number of of the following circumstances are true:

• The connection to the server requires a certification authority (CA).
• You haven’t trusted the certification authority at the root.
• The certificate could also be invalid or revoked.
• The certificate doesn’t match the title of the web site.
• A 3rd-party add-in or a third-party browser add-in is stopping entry.

There is a problem with the proxy server’s security certificate – Outlook error

Should you’re confronted with this situation in your Home windows 11/10 PC, you may strive our beneficial options beneath in no specific order and see if that helps to repair the Outlook error message There is a problem with the proxy server’s security certificate.

1. Verify Proxy server certificate
2. Set up the trusted root certificate
3. Disable third-party add-on in Outlook
4. Disable third-party browser add-ins
5. Manually configure Trade Proxy Settings in Outlook

Let’s take a take a look at the description of the course of concerned regarding every of the listed options.

1] Verify Proxy server certificate

This resolution requires you to examine the certificate, after which contact your system administrator to resolve this There is a problem with the proxy server’s security certificate situation.

To examine the proxy server certificate, do the following:

• Open Edge browser in your Home windows 11/10 PC.
• Sort or copy and paste the URL beneath into the tackle bar of the net browser and hit Enter. Change the server_name placeholder with the RPC server title or the safe server title.

https://www.server_name.com/rpc

• Subsequent, click on the padlock icon on the tackle bar.
• On the flyout, click on Connection is safe.
• Click on on the Security Certificate icon to view the Security Certificate.
• In the Security Certificate properties sheet, click on the Particulars tab.
• Now, make a notice of the data in the fields highlighted on the picture above.

The Legitimate to area ought to point out the date till which the certificate is legitimate. The information in the Topic area ought to match the web site title – and if this is not the case, contact your IT administrator.

2] Set up the Trusted Root Certificate

This resolution requires you to put in the Trusted Root Certificate on the Home windows 11/10 shopper laptop.

Do the following:

• When the error happens and also you’re prompted with the Certificate dialog field, click on Set up Certificate.
• Click on Subsequent.
• Click on to pick the Place all certificate in the following retailer examine field.
• Click on Browse.
• Click on Trusted Root Certification Authorities.
• Click on OK.
• Click on Subsequent.
• Click on End.
• Click on OK.

3] Disable third-party add-on in Outlook

One other viable resolution to repair the error in view is to disable third-party add-in in Outlook. To do that, you first want to begin Outlook in Secure Mode, and if Outlook efficiently opens in Secure Mode, then it’s seemingly the error is triggered by third-party add-ons.

To disable third-party COM add-ins in Outlook, do the following:

• Begin Outlook in Secure Mode.
• On the File menu, click on Choices > Add-Ins.
• In the Handle field, click on COM Add-ins > Go.
• Now, uncheck the field for the third-party add-ins that you simply wish to disable.
• Restart Outlook.

4] Disable third-party browser add-ins

Relying in your browser, this resolution requires you to disable third-party browser add-ins and see if that helps to resolve the situation. In any other case, strive the subsequent resolution.

5] Manually configure Trade Proxy Settings in Outlook

To manually configure Trade Proxy Settings in Outlook, do the following:

• Open Microsoft Outlook.
• Navigate to Account Settings > Extra Settings > Connection > Trade Proxy Settings.
• Now, sort in the tackle beneath into the Solely hook up with proxy servers which have this principal title of their certificate area.

msstd:webmail.area.com

Alternatively, to attain the identical end result, do the following:

• Press Home windows key + X to open Energy Consumer Menu.
• Faucet A on the keyboard to launch PowerShell in admin/elevated mode.
• In the PowerShell console, sort in or copy and paste the command beneath and hit Enter.

Set-OutlookProvider EXPR -CertPrincipalName:$null

• Exit PowerShell when the cmdlet executes.

How do I do away with security certificate errors?

To do away with security certificate errors on Home windows 11/10, you should disable this feature. Observe these directions:

• Open Management Panel.
• Choose Web Choices.
• Click on the Superior tab.
• Scroll all the way down to the Security part.
• Underneath the Security part, uncheck the Warn about certificate tackle mismatch choice.
• Click on Apply > OK to save lots of the adjustments.
• Reboot your PC.

Associated put up: Error 0x80004005, The Operation Failed in Outlook

Why does Outlook say unable to hook up with proxy server?

If Outlook says something about the proxy server, you should examine the inner settings first. Most often, it seems when Outlook fails to confirm the security certificate of the proxy server. If that’s the case, you should observe the aforementioned suggestions and tips to do away with the problem.

Learn: Your Outlook account settings are outdated in Mail or Calendar app.

Why am I getting a security certificate warning?

The explanation why you could be getting a security certificate warning in your Home windows 11/10 PC is because of incorrect date and time. Security certificates are utilized by net browsers and computer systems to verify a specific web site is protected. So, in case your laptop has the improper date and time, it may possibly trigger certificates to seem invalid & your net browser will start to situation security warnings. So, be sure the date and time is appropriate in your laptop.

That’s it! Hope it helped.