The page at\n[URL]http://technet2.microsoft.com/windowsserver/en/library/3a8c83c3-4eac-4cc3-86fc-a54e67de9c121033.mspx?mfr=true[/URL]\nsays to modify the system32\inetsrv\applicationhost.config file after\ninstalling IIS 7 on Windows Server 2008. I'm finding this instruction a bit\npuzling and wonder if anyone can shed some light on it.\n\nI'm in the process of moving my existing WSUS 3.0 from a Windows Server 2008\n(RTM) 32 installation to a Windows Server 2008 (RTM) 64 bit installation.\nThe WSUS installation on the 32 bit server has been operating since it was\ninstalled shortly after Windows Server 2008 went RTM. I previously had it\ninstalled on a beta release of Windows Server 2008.\n\nThe WSUS server on the 32 bit server appears to be functioning normally -\nclients are getting updates and it syncronizes with Microsoft Windows Update\nroutinely.\n\n1. on the 32 bit server I did not make any changes to the IIS\napplictionhost.config file, but WSUS is working correctly - so what is this\nchange supposed to do?\n\n2. There does not appear to be a file called applicationhost.config in the\nfolder system32\inetsrv on either the 32 bit or 64 bit Windows Server 2008.\nThere is however an applicationhost.config file in the folder\nsystem32\inetsrv\config on both the 32 bit and 64 bit server (there is no\napplicationhost.config in syswow64\inetsrv\config folder on the 64 bit\nserver). Is this a simple mistake in the above document or does this\ninstruction only apply if there is an applicationhost.config file in the\nsystem32\inetsrv folder?\n\n3. What are the implications of NOT making the change specified in the\n"Configuring IIS 7.0" section of the above page?\n\nBy way of information, in the file\nsystem32\inetsrv\config\applicationhost.config, there is a\n<system.webServer><modules> tag and there is also a line with <add\nname="CustomErrorModule"> inside that tag.