Single Sign On with NT Domain logins into WebApp

I did not knew that it is possible to use the Windows Domain login as a SSO source for a J2EE webapp. But it is. I cam accross it at Lucas Jellema post
He refers to the description at Samba: JCIFS NTLM HTTP Authentication
I do not need this feature in any of my companies webapps now, but it is nice to know about this feature.