Can server 2008R2 replace all my other servers?

Hi,
My company has 4 locations, one of which is the corp. office. Each location has its own Win NT file/print server and Win NT exchange server. If I were to install the server 2008R2 at the corp. office location, can I get rid of all the other servers at all of the locations and access and use the one server 2008R2 from all locations? I will be upgrading all 60+ PCs to Windows 7 pro.