I have Exchange and OWA running ok.
I have activated Mobile Access at Exchange System Manager/Global Settings folder/Mobile Services and the Enable Outlook Mobile Access and unsuported devices are enabled.
About IIS Manager, the OMA folder has unchecked SSL require, and basic and integrated authentify...
I have reseted IIS "iisreset" command
Then I try http://server/oma
and get this message
"A System error has occurred while processing your request. Please try again. If the problem persists, contact your administrator"
I think I have all the requeriments activated... Any ideas?