I went to save a Word document and was asked to log in since cached credentials have expired. I logged in. I was asked to log in again.
When I went to file>account> it showed that I was already logged in, so I'm not sure what the endless loop is all about. It's frustrating because I cannot save any changes to a document. I edit for a living so this is really frustrating. I tried the steps outlined in other discussions to no avail