F5 OWA and APM LandingPage

Hello,

short question about OWA and a redirect. I want that if someone types https://xyz.domain.com, then it should automatically be redirected to https://xyz.domain.com/owa. With normal iRule (when HTTP_Request) assigned to the VS and it works, but the problem is that, then I have two sessions in APM, which is also logical, because in principle you call the link twice. One session is then "blue" until it expires. How is it possible that I get just one session in the APM ?

cheers

Manu