By default, the Report and Dashboard Server is configured to use HTTP (Hypertext Transfer Protocol). To switch the Report and Dashboard Server to operating over a more secure HTTPS protocol, do the following.
Open the Command Prompt with administrative permissions.
Navigate to the Report and Dashboard Server directory ("C:\Program Files (x86)\DevExpress\Report Server" by default) and switch to the "Tools" folder. In this folder, run the ConfigureSecurityMode.exe file with the corresponding options as follows.
“ConfigureSecurityMode.exe -c ..\Web\web.config -s"
Upon command execution, the following message is displayed: "Mode switching has been successfully completed (Https)".