First of all, what is the real need to do that? If one works then use it.
If you really have the need, I would set it up independantly of Outlook.
Outlook has a hard enough time doing what it needs to without hanging or
shitting down. Trying to get opposing programs to try doing the same thing
is just not built into the system to handle. Even if you could, and you
can't unless you turn one off in your task manager and start another up, I
would not want to wait for it to try to figure out. That is unless you want
to order a pizza while you wait.