I was trying to remove FrontPage Server Extensions 2002 from the default virtual web on my Windows Server 2003 install so that I could install Windows SharePoint Services 2.0.

When I right clicked on the web and selected Remove Server Extensions from the tasks menu, I got an error "Microsoft FrontPage Server Extensions. Server extensions administration port not found."

For some reason, the admin port wasn't set but according to Phil Jankovitch, a quick fix is possible using the owsadm tool from C:\Program Files\Common Files\Microsoft Shared\web server extensions\50\bin:

To check current admin port type: owsadm -o getadminport
To change admin port type: owsadm -o setadminport -p 8888 where 8888 is a port number.