I have ArcGIS for Server 10.3.1 installed on a vm with Windows Server 2012. I am using a Web Adaptor on my web server which is on a different machine. I am using Active Directory for my user store, ArcGIS authentication and roles. This is an intermittent error meaning sometimes my print service works and sometimes it does not! Here is a screen capture of the error in ArcGIS Server Manager. We do not have HTTPS set-up. The Geoprocessing/SecuredBasicPrinting.GPServer is a geoprocessing script that I published following the tutorial by esri. I do not have port 443 in my bindings for my web site and understand that I could add it but the question has more to do with WHY is the print service trying to access a token through https? And should I just ignore this error? But why is my print service failing intermittently?