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Redirecting CNAME to secure domain

Hi, our organization is trying to redirect traffic to a specific secure site domain using a CNAME record, but it doesn't seem to be working.

Our current Salesforce site url is:
We've setup a CNAME in our web/DNS host to point to

When you visit you will receive a standard Salesforce "URL No Longer Exists" page.

Quick note: we don't have a SSL certificate yet for the domain, so you'll need to "ignore" your browser's unsecured connection warning to load the above page.

Any thoughts on why we may be receiving this error?

Thank you for your help,


URL No Longer Exists
You have attempted to reach a URL that no longer exists on 

You may have reached this page after clicking on a direct link into the application. This direct link might be: 
• A bookmark to a particular page, such as a report or view 
• A link to a particular page in the Custom Links section of your Home Tab, or a Custom Link 
• A link to a particular page in your email templates 

If you reached this page through a bookmark, you are probably trying to access something that has moved. Please update your bookmark. 

If you reached this page through any of the other direct links listed above, please notify your administrator to update the link. 

If you reached this page through a link on our site, please report the broken link directly to our Support Team and we will fix it promptly. Please indicate the page you were on when you clicked the link as well as any other related information. We apologize for the inconvenience. 

Thank you again for your patience and assistance. And thanks for using!