SAP to CRM Dynamics Authentication

Hello,

I am not an CRM expert at all, I only have knowledge on the middleware SAP PI.

We have a project where SAP PI needs to connect to the CRM Dynamics System to Post some data via SOAP Protocol.

The URL the CRM Dynamics people gave to us looks like following: http://abc.com/xxxxx/XRMServices/2011/Organization.svc/web

Unfortunately we are not able to authenticate to this CRM Service.

We tried using NTLMv1 (NTLMv2 is not supported by our middleware) but we are getting HTTP 401 Unauthorized. To be honest we dont have any experiences in setting up NTLM connections. Usually we use Basic Auth for SOAP connections.

Now I am hoping to get some help from the CRM Experts in this Community.

Is it possible to access CRM Dynamics Webservices via basic auth? If yes, how? Which settings are needed on CRM System? Which on IIS? Using Basic Auth would be our prefered solution.

Thanks a lot.