According to the FMS / FMSA 11 Read-me,
Installing FileMaker Server on Windows Server 2008 requires the user Anonymous to be enabled. When installing FileMaker Server on Windows Server 2008, if the user Anonymous is disabled then the Deployment Assistant cannot find IIS 7 (Internet Information Services 7.0). Enable the user Anonymous before installing FileMaker Server.
I'm upgradeing a client from FMS 10 to FMS 11 on a Windows 2008 R2 Enterprise machine. Neither IIS 7 nor Anonymous is present.
Are these really required to install FMS 11 or only for FMS Advanced?