When I tried to log into the Azure Portal from Microsoft Edge, I was greeted with a little surprise. It looks like MS has decided to stop supporting their new browser.
Must be a bug in the latest release of Azure Portal, as the link on the page does state, Edge (latest) is supported.
As far as I know, I have the latest stable version of Edge, 13.10586.
Well I will have to see, how long it will take for MS to fix this bug.