Able to Authorize user but Permission denied when calling to list a List

[mareczek]

First of all thank you for a great gem!

I have a rails api-only app. I configured a user on Sharepoint as a site admin with all permissions (with User permissions not Policy).

When I request folders from this site first the NTLM mechanism is providing the Authorization Token and sends a proper request but Sharepoint returns Permission denied.

Should I add any other settings for these types of requests?