OfficeXP on multiple machines?

Hey all ye tachs in techlands:

Please don't interpret this question as an attempt at potential piracy, this is an effort to educated the public. What happens when multiple copies of the same officeXP liscence are activated by the customer (and his friends)? Is this caught/noticed by MS? Will the prog work when the second attempt is made to activate it on computer #2? Or is the information just stored by M$ for later use?

Anyone with XPerience here please respond...

THANKS TEAM!!