Using Secure Web Service Methods
Certain Report Server Web service methods may require a secure connection when you invoke them. The methods that require a secure connection are determined by the SecureConnectionLevel setting in the RSReportServer.config file. The value of the setting is an integer value with a valid range of 0 and higher. The following table describes these values.
Not secure. Calls made to the Reporting Services SOAP API do not require a secure connection.
Greater than 0
Secure. All calls made to the Reporting Services SOAP API require a secure connection.
You can use the ListSecureMethods method of the Web service to return a list of Web service methods that require a secure connection according to the current configuration of the report server. In an SSL scenario, you should evaluate the list of methods that are returned by ListSecureMethods and change the scheme name of the Web service URI to "https" or "http" depending on the method being called.