|Seeing this an increasing number of times - and it's frustrating.|
If you have a site that requires a password or sign-on string, there is not much use in saying "see the attached link" as a means of letting the reader see what a problem is. When you click on that link, you are told that an invitation or password is required. End of story - no way of determining the exact details of a problem.
If you are in such a situation, you need to "snip" the page concerned and then download that to TP. You can then include a link to the image.