Office Communications Server 2007 Edge Server Deployment Guide, found at http://www.microsoft.com/downloads/details.aspx?familyid=ed45b74e-00c4-40d2-abee-216ce50f5ad2&displaylang=en

Office Communication Server 2007 Resource Kit Tools (snooper.exe used in this section), found at http://www.microsoft.com/downloads/details.aspx?familyid=b9bf4f71-fb0b-4de9-962f-c56b70a8aecd&displaylang=en

The article "You cannot start the Communications Server 2007 logging and tracing tool from an Access Edge server or from a front-end server," found at http://support.microsoft.com/kb/941315/en-us