hard disk encryption for server in public environment

Hello,

I am a trade manager and I would like to know possibilities only, currently I Have a problems with my IT administraor.

In my organisation I have an Windows 2008 R2 file server with other services also running,
I have a server in central point of my office, without physical access control.
I am affraid. that it is possible to someone remove the disk or disks and gave part of data which should be encypted.  But on our servers data is not encrypted, but long time ago I have heard about something similar as a privacy protection:

1. Server is running with any encyption service, it encrpyt all the data placed on its hdds,

2. Encryption needs a certficate renewal on setted time - e..g two weeks [ if I did not update certfifcates by two weeks machine will not decrypt files ] Renewal is needed in case the uthorized person will be out of my company.

3. If I update certs I will have more time and good, authorized access.

Is it possible on Windows Server 2008 R2 by a standard configuration?

If not, what solution should I looking for?



Thank you for your help :)