Good morining.

I encount a windows authentication problem. I use moov2's "AlexZh.WindowsAuthentication", it's really great. but when click "Logout" it will cause an exception. I have found on the method "OnActionExecuting" in Orchard.User.AccountController cause the exception. I want to comment the code below:
           if (filterContext.HttpContext.User.Identity is WindowsIdentity) {
                throw new InvalidOperationException(T("Windows authentication is not supported.").ToString());
            }

In other word I want to comment the "OnActionExecuting". it will be OK? or it will cause something other exception?

I don't think this code is necessary. Does commenting it fixes all your issues ? Could you have the author of the module comment on this change ?