Transfer windows authentication credentials to another website

[kplkumar]

I have site1 running on machine1. I have another site2 running on
machine2. Both these machines are part of the same windows domain.

Both site1 and site2 use integrated windows authentication.

I login to site1, then I want to get transferred to site2, only that I
don't want to be prompted for my username/password again. I want to
transfer all the credentials I had on my first login to site2.

Is this possible in Integrated Windows Autentication? If so how can
this be done?