404 - Not Found and SSL Certificate Errors After Custom URL

404 - Not Found and SSL Certificate Errors After Custom URL

We are ZOHO Support users, and just setup a custom domain URL. Now anytime we try to access Support (our employees and admins logging in) we are faced with 404 - Not Found error messages. For example, when typing support.zoho.com and logged into our account, it will automatically forward to:

https://support.ourdomainame.com/support/ourusername/ShowHomePage.do

and display:

404 - Not Found

Further, because it is forwarding to zoho.com, we get a support.zoho.com ssl_error_bad_cert_domain error in browsers that must utilize a security exception/override.

Please address this promptly as it has rendered our service unusable.