Before WebCopy tries to access a resource, it will try and get a set of credentials matching the resource URL. If you have defined such credentials, then these will be passed to the request.
However, if you are analyzing or copying a website and a 401
(Unauthorised) response is returned, WebCopy will do the following:
When WebCopy prompts for a password during a crawl, you can optionally cancel further prompting by clicking the Do not prompt for further passwords button.