Test URL fails with 403 error and the following in the url_response.log:
Aug 11 11:52:06:943 [10256] url_response: [test_url] DBG: < HTTP/1.1 403 Forbidden
Aug 11 11:52:06:943 [10256] url_response: [test_url] DBG: < X-MSDAVEXT_Error: 917656; Access+denied.+Before+opening+files+in+this+location%2c+you+must+first+browse+to+the+web+site+and+select+the+option+to+login+automatically.
Adding an * 'asterisk' to the end of the URL, may allow to get past the 403 error.