WebApp Sec: Achieving Sign On for non-web resource.

[Babu Kopparam <babukopparam () gmail com>]

Hi! Gurus,

I have provided single sign on for multiple web applications using domain cookies.
This works fine.

Now there is a requirement that, one particula link opens up a MS Excel client. This client will contact multiple 
services (web resources) spanned across multiple web applications.
As far as i know, i can't use cookies in the Excel.

Can some one help me in providing a single sign on solution for such a situation.

Thanks in advance,
-Babu