To submit an XML-based Sitemap to Bing:
Step 1: Copy and paste the entire URL below as a single URL into the address bar of your browser:
http://www.bing.com/webmaster/ping.aspx?sitemap=www.YourWebAddress.com/sitemap.xml
Step 2: Change “www.YourWebAddress.com” to your domain name
Step 3: Press ENTER