If you create a PowerCenter task with an FTP/SFTP target connection and the IS_STAGED option is enabled for the underlying PowerCenter session, Data Integration writes the flat file to the remote machine and the following local directory:
For PowerCenter tasks, Data Integration ignores the Local Directory property specified in the FTP/SFTP connection. Instead, it uses properties specified in the PowerCenter session. To change the local directory or default local filename, change the Output File Directory and Output Filename session properties in PowerCenter. Then export the workflow from PowerCenter to an XML file and re-import the XML file into Data Integration.