capture microsoft adcenter refer

We would like to capture Microsoft adcenter as the referer so that when a user lands on our landing page we can tag the session and the membership signup to Microsoft adcenter within our database.At first we capture the session in Apache and then we would like to push in the referer into our DB,Does anyone know how we can capture or what the string to capture Microsoft adcenter as the referer to our website?Thanks.

 

just ad something like ?campaign=adcenter or &campaign=adcenter to the end of your uRL