You can upload an RSS XML file and episodes for publication after specifying the publish configuration. Remember to add episodes before you upload. This generates a new XML file during upload and uploads items marked as Publish.
To upload an RSS XML file for publications
On the Publications tab, click the channel, then do one of the following:
On the toolbar, click the Upload icon 
.
Right-click the channel, then click Upload.
The selected channel is uploaded to the specified server.