Hi, I try to allow owa login thru ADFS on Exchange 2010 SP1 Rollup 3 v3 (on Windows 2008 R2). To achieve this I folowed this guide : http://download.microsoft.com/documents/France/Interop/2011/Exposing_OWA2010_ADFS20_Other_Organizations.docx But enabling anonymous authentication on OWA virtual folder throw this error : There's an error in your Outlook Web App configuration. The authentication type on the /owa virtual directory is set to Anonymous. This check box must be cleared for Outlook Web App to function correctly. Is it possible to disable this check ? Is there a workarround ? Thanks. Julien Nury

Hi, Try to disable the form based authentication, and then you will be able to enable the "anonymous authentication".