NSX multi sites question

Hi,

Let's say you have Data Center A and B and you stretched a subnet in NSX across both sites. These two DC are connected with high bandwidth links (let's say dark fibers).

Now these two sites are also connected to several remote sites (desktop users) through a WAN.

Now you have a server on that stretched subnet that can move between DC A and B.

If a user on a remote site wants connect to this server and it's currently located in DC B, how do you make sure the traffic from this remote site take a direct path to DC B and not go to DC A first then go through the dark fibers links to DC B ?

thanks