MS-Logon - Single Sign On

[nerkgeek]

I have looked, but not found anyone asking this question... but if it's out there I apologize for asking again.
However....I am setting up UltraVNC server on a couple domain workstations to try it out.
I like the MS-Logon and have it working with groups, remote install, etc etc....

However, I would be curious if there's a way to connect without prompting for credentials.
Since I'm already signed into Windows with the same credentials I'm typing into the viewer, it would save some time.
We have a couple applications that do this, I'm just not sure if UltraVNC is able to pull from that same authentication method or not.

Thanks in Advance!