Back in the day, I set up our Webaccess agents and application on its own
server, but I placed it in the domain for our GWIA, which exists on a
different server.
That has come back to bite me, in that I cannot reboot the GWIA server
without disrupting webaccess

How feasible/involved would it be to to create a new domain on the server
running webaccess, and then "moving " the webaccess to the new domain?