These settings allow you to control whether users can add discussion items to this Office-extended server for documents located on remote computers.
If discussions are enabled, users can connect to it and create discussion threads linked to any Office 9, Rich Text Format (RTF), or HTML document. To limit discussion threads exclusively to documents located on this Office-extended server, select the Documents located on this server only option. To allow discussion threads on any local or remote document, select the Documents located anywhere on the web option.