What configuration would you recommend for more security?

At the moment we have GroupWise Mobile Server and a couple of GroupWise POA's in internal net. We have Novell Access Manager, too. But we use it only for WebAccess and SSLVPN, not for Mobile Server. To secure Mobile server, we installed Secure Gateway in DMZ.

Where should I place my Data Sync (Mobility Pack) server?
- In DMZ, I think. Maybe secured with Access Manager (reverse proxy)?
- Or is it possible to separate components of Data Sync? Synchronizer Service and GroupWise Connector in internal Net, and Mobility Connector in DMZ?

Thank you