Your on-premises organization is unable to connect the Office 365 tenant Autodiscover endpoint for domain {0}. This is typical ...

Your on-premises organization is unable to connect the Office 365 tenant Autodiscover endpoint for domain {0}.  This is typical means that either your on-premises Exchange servers cannot resolve the DNS domain or cannot connect outbound to the Internet via HTTPS. For more information, see http://go.microsoft.com/fwlink/?LinkId=262803.