I have a public facing website, but the sitemap.xml is not generated. The Search Engine Sitemap site collection Feature is active and I can edit the Search Engine Sitemap Settings. The robots.txt is automatically updated but the sitemap XML location is not appendend and the sitemap.xml is not available at http://[url]/sitemap.xml.
Do you have any suggestion what the problem might be?
This is usually not an error but a result of an improperly configured search engine. The "Search Engine Sitemap" feature solely relies on your internal search engine to generate the sitemap.
We had the same problem. Checking Central Admin > Monitoring > Review job definitions and selecting the "Search Engine Sitemap job" showed it to be set for a daily Execution. Running this job manually seemed to execute with no errors as evident while running this handy ULS log viewer in live monitoring mode.
My colleague found that in fact none of the jobs were being executed correctly because the Sharepoint Timer Service wasn't started. Setting it with a correct admin user and starting the service resolved the issue.
In SharePoint Administration run
Search Engine Sitemap job Manually
