OWA Disable replacecurrent?

Hello,

I have two exchange servers located at different sites.  Each site also has a reverse proxy for accessing ActiveSync and OWA.

Each proxy uses load balancing to ensure ActiveSync/OWA is accessible to outside users.  However because the proxy is using a different port (:444) to access the internal OWA sites it keeps redirecting the outside users to port :444.

When an outside user visits https://owa.domain.tld/owa the URL changes to:

https://owa.domain.tld/owa/auth/logon.aspx?replaceCurrent=1&url=https%3a%2f%2fowa.domain.tld%3a444%2fowa%2f

This causes them to try and access the OWA site on port :444 from outside our network but that port is not allowed.

So why is OWA trying to redirect them to port :444?  Can I stop it from doing this?

Thanks.