The CVM Computing Handbook states:
"The use of Instant Messaging programs within the College of Veterinary Medicine is limited to the program(s) approved by the CVM Technology Advisory Committee. In addition, the approved IM program(s) should not be used to read or send e-mail, or to transfer files of any type between users. Users desiring to communicate via IM should be using machines that have the approved antivirus software installed and active, along with the current antivirus signatures."
The approved IM program at CVM is Microsoft's Skype, which can be downloaded HERE.