This would be done by first setting them all up for remote administration. Once in a while you get a new IT person that wants to do this without setup or getting at the machines. So if you did all the prep such as noted at http://social.technet.microsoft.com/Forums/systemcenter/en-US/191ea13c-c5bc-43e2-bdee-658e381fcfad/bitlocker-remote-tpm-activation then it may be possible.
If not, you call them back in and start again.
Bob
Does anyone know a good way to remotely enable the TPM on dell laptops. I am looking to do this on all laptop on my domian.
Most our computers are running either windows 7 enterprise or ultimate and are the Dell Lattitude series

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic