If you choose to use a Messaging Server 6.3 back-end with a Messaging Server 6 2005Q4 front-end, you need to configure the front end to run without an Administration Server as follows:
Install and configure the Messaging Server 6.3 back-end using the Communications Suite 5 installer.
Run the Java Enterprise System 2005Q4 installer to install the Messaging Server 6 2005Q4 front-end and choose the Configure Later option when prompted.
Open msg-svr-base/lib/config-templates/DevsetupDefaults.properties in a text editor.
Change the following line:
ADMINSERVER_SERVERROOT_CONF = /etc/mps/admin/v.5.2/shared/config/serverroot.conf
to:
ADMINSERVER_SERVERROOT_CONF = NO_ADMIN_SERVER