UTM 9 and sharepoint

[kevin_lane]

Can anyone give me advise on trying to setup a sso with sophos UTM9 as having difficulty can access the login page that sophos uses but I get a error saying it can access the site a 403 error been onto the support and they are a bit unsure aswell just wondering if anyone else has had this issue

[kevin_lane]

Just tired logging in from my mobile and I get this error

 

Forbidden

 

You don't have permission to access /CookieAuth.dll on this server.

[kevin_lane]

I sometimes why im in IT after trying to resolve this issue sophos have basically said they don't know so have decided to go back to isa 2006 which works