That service pack IS upgrading to MPS4.0. It changes all the binaries to the MPS4 binaries. From there all you would do is change the Metaframe version to 4.0. Jeff Pitsch Microsoft MVP - Terminal Server Forums not enough? Get support from the experts at your business http://jeffpitschconsulting.com On 4/4/06, Cathy Campbell <Cathy.Campbell@xxxxxxx> wrote: > > Is it required to install Service Pack 2005.04 on all of my MPS 3.0servers > in my farm before upgrading to MPS > 4.0? > > >