K2 Blackpearl Out Of Office - forward all work items to....

Hi All, 

I am relatively new to K2 so please accept my appologies if this is an obvious answer, I am retrieving a users out of office status from the api, using GetUserStatus();

How do i get who the users out of office work items are forwarded too? is there a method i need to call? i cant seem to find one

Thanks

TC