Outlook Security Certificate Error after Directing Website to CPanel Host

By default when you enter credentials into Outlook it first searches for yourdomain/autodiscover/autodiscover.xml - if this file doesn't exist on your website it will move on to the O365 record.

However, if your website, yourdomain.com, is pointed to a host managed with CPanel, your Outlook users may start getting one of these errors:

Error: "Information you exchange with this site cannot be viewed or changed by others. However, there is a problem with the site's security certificate."

Error: "The security certificate was issued by a company you have not chosen to trust. View the certificate to determine whether you want to trust the certifying authority."

Error: "The name on the security certificate is invalid or does not match the name of the site.
The security certificate has expired or is not yet valid."

Log into the CPanel, scroll down to Email, and click on MX Entry.

Select Remote Mail Exchanger and click Change. This will stop Outlook from finding the autodiscover.xml file from your CPanel Email, and it will then move on to the O365 location instead.