WCF - Cannot obtain Metadata

Question

It is running in an Intranet using IIS 7 and it works fine whenever I enable Anonymous Authentication in the IIS Manager. If I disable it and try to run it using wcftestclient t

Answer 1

Javi was right, I had to remove the mex endpoint and just for the records, this is the final version of the web.config:

more details here, IIS hosted WCF-service + Windows auth in IIS + TransportCredentialOnly/Windows auth in basicHttpBinding