Invalid Security Certificate Name Mismatch Error

In today’s digital age, online security is of utmost importance. However, sometimes even the most secure websites encounter errors. One such error is the invalid security certificate name mismatch. Let’s understand what it is and how to deal with it.

Indications of a Mismatched Security Certificate

If using Microsoft Outlook or Office365, a Mismatch Error may occur when attempting to use Autodiscover to connect to the Exchange Server. This can also happen when using Windows or other TLS Certificate enabled devices.

To resolve this issue, ensure that the certificate being used is issued by a trusted Certificate Authority and that the Common Name matches the domain being accessed. If using Microsoft products, check that the Microsoft Outlook Certificate and Microsoft 365 Certificate are correctly configured. Consider contacting your IT support team or the website administrator for further assistance.

Reasons for a Security Certificate and Site Name Mismatch

A Security Certificate Name Mismatch Error occurs when there is a discrepancy between the site’s Common Name (CN) and the name on the Security Certificate. This can happen for a variety of reasons, such as an incorrectly issued certificate or a phishing attempt. One common cause is when using Microsoft Outlook or Office365, which may generate an Autodiscover security alert. This is because Outlook is attempting to connect to the Exchange Server, and the certificate may not match the expected name. To resolve this issue, you can try updating your TLS Certificate or contacting your Certificate Authority for assistance. Additionally, make sure your Windows and Outlook are updated to the latest versions. By taking these steps, you can minimize the risk of a security breach and ensure your online transactions remain secure.

Ways to Resolve a Security Certificate and Site Name Mismatch

• Make sure the website URL is correct
• Ensure there are no typos or misspellings in the URL
• Double-check the website URL for accuracy

Method 2: Clear Browser Cache and Cookies

• Open the browser
• Clear cache and cookies from the browser settings
• Restart the browser
• Try to access the website again

Method 3: Disable Antivirus or Firewall

• Open the antivirus or firewall settings
• Turn off the antivirus or firewall temporarily
  
• Try to access the website again
• If successful, add the website as an exception in the antivirus or firewall settings

Method 4: Check the System Date and Time

• Open the system settings
• Check the date and time
  
• Correct the date and time if necessary
• Try to access the website again

Method 5: Update Browser and Operating System

• Check for available updates for the browser and operating system
• Install any available updates
• Restart the browser and operating system
• Try to access the website again

Using an SRV Record to Replace an A Record

If you’re experiencing a security certificate name mismatch error, it may be due to an A record in your DNS. You can replace the A record with an SRV record to resolve the issue. Here’s how:

1. Log in to your DNS provider’s website.
2. Find the section for managing your DNS records.
3. Locate the A record for your autodiscover service and delete it.
4. Add an SRV record with the following details:

Service: _autodiscover
Protocol: _tcp
Name: your domain name (e.g. example.com)
Priority: 0
Weight: 0
Port: 443
Target: your autodiscover service hostname (e.g. autodiscover.example.com)

5. Save your changes and wait for DNS propagation.

This should resolve the security certificate name mismatch error when using Outlook or Office 365. If you’re still encountering issues, consider checking your TLS certificate and certificate authority settings, as well as any security alerts from Microsoft or your exchange server.

Additional Information on Security Certificate and Site Name Mismatch

When you encounter a security certificate and site name mismatch error, it means that the common name on the certificate doesn’t match the URL of the website you’re visiting. This can happen when accessing sites with multiple subdomains or when connecting to a server via an IP address.

To resolve this error, ensure that you’re typing the correct URL in the address bar and that you’re not being redirected to a phishing site. If you’re using Microsoft Outlook, check the autodiscover settings and ensure that your certificate authority is trusted by Outlook.

If you’re using Office 365 or Microsoft 365, verify that your certificate has a subject alternative name (SAN) that includes all applicable domains and subdomains. For Exchange Server, ensure that your TLS certificate is properly configured and that the server name matches the certificate name.

If you continue to receive a security alert, contact your IT department or webmaster for assistance. Always exercise caution when accessing websites and ensure that your computer is up-to-date with the latest security patches and updates for Windows.

Finding Help and More Options for a Security Certificate and Site Name Mismatch

Harrison Stead