You will have to ask the Network and/or Exchange Administrator if they allow
connections from a home computer first, and if so how it's done.
Many places do not allow connection from a home computer for security
reasons, plus too many users would expect that the home machine then be
supported by network staff.
Most places would issue a laptop that is configured with software to allow
it to connect to the workplace or a handheld such as a Palm, Blackberry, etc.