Script for Inactive computer from last logon time stamp

Hi Freinds,

I have a list of servers which include some specific servers (around 900 servers). now i need to check those servers which are not logged on from last 30 or 60 days. 

I find the scripts which run against AD and list the servers but here i need to check from the specific servers. 

I know this is possible but not sure how it can be. Please Help 

Thanks.

Anjani Kumar