For a report server running in native mode, the path to the report server where the project is deployed, for example http://servername/reportserver. ...

For a report server running in native mode, the path to the report server where the project is deployed, for example http://servername/reportserver.  For a report server running in Sharepoint integrated mode, the URL of the Sharepoint site to which the project is deployed, for example http://servername.