Use the following to obtain the value of the server-root variable.
Sun Java System Messaging Server (Messaging Server 6):
pkgparam -v SUNWmsgco
rpm -q --qf '%{INSTALLPREFIX}' sun-messsaging-server
iPlanet Messaging Server (Messaging Server 5):
Look in the/etc/msgregistry.inf file.
Look in the C:\windows\system32\etc\msgregistry.inf file.