WebSphere Portal - Google sitemap.xml

Sitemap XML feed could be accessed from Search sitemap portlet.

1. Find the Search Sitemap in Portal Administration > Portlets
2. Click configure

1. Set EXPORT to true. 
2. If there is no EXPORT variable, add it (key=EXPORT, value=true).
3. Restart Portal or just the PA_Search_Center application from the WAS Integration Solution Console.
   
4. Open a page with Search Sitemap, and you should see a button to download sitemap.xml.
5. You can this use in Google Webmasters Tools as sitemap.xml feed.
6. To find out url use browser inspector, or just see downloaded sitemap.xml url

http://<yourdomain>/wps/PA_SearchSitemapPort/exportServlet?lastMod=&priority=&frequency=&topLevelListPref=Z6_CGAH47L0004820IDBHD79M00I6&showLvl1=no&showLocales=no&localeListPref=cs

Now you can  disable export again (EXPORT is only about frontend functionality), URL should works in both situation (EXPORT=true or EXPORT=false).