Download the file that has popped up next to the browse section
Copy that file and paste in the root folder of the website on the server
Create the XML Site Map and Submit to Search Engines
Login to Administration on the website
Go to Content Management > Output Site Map to File (this will generate an XML Site Map and outputs it to a file called [domain]-sitemap.xml into the root folder on the server)
Now go to Content Management > View Site Map
Check that each URL is correct and there are no unwanted URLs (e.g. http://www.[domain].com.au/Default.aspx?PageType=MethodView&Method=UserArea)
Finally, go to Content Management > Submit Site Map to Search Engines to finish