Question : Connecting two LANS in different locations

I need to know how to connect two LANS in two different physical locations.  Each site would have a pix and a cisco router.  What else do I need in the second site for the workstation to connect to the main office domain.  We want the users in site two to be able to connect to the smae domain as the main office and have access to the same files and shares and programs.

Answer : Connecting two LANS in different locations

why not just host the mail for 1234.com on your exchange server?