SBS 2011 with SP1 installed, which installed fine, upon reboot the permissions for several directories within IIS were incorrect along with all exchange services disabled.
Since then have repaired permissions on OWA and all other directories, apart from an error 500 error message on EMC.
Have checked directory permissions on Powershell vdir, removed and rebuilt it under IIS, checked authentication so ssl is disabled and only enabled anonymous access, checked kerbauth and wsman are registered at root and enabled in powershell modules. Have tried removing and reinstalling WS man IIS Extension as well no go. Exchange path variable is correct as well.
Still receiving error when opening EMC http 500.