From the The Official SBS Blog : Installing a Self-Signed Certificate as a Trusted Root CA in Windows Vistahttp://192.168.2.20/blogs/doverton/archive/2007/05/04/from-the-the-official-sbs-blog-installing-a-self-signed-certificate-as-a-trusted-root-ca-in-windows-vista.aspxI've talked about this before, but thought it was worth pointing people to this Installing a Self-Signed Certificate as a Trusted Root CA in Windows Vista [Today's post comes to us courtesy of Wayne McIntyre] In order for RPC over Http to workenCommunityServer 2008.5 SP2 (Build: 40407.4157)