https://bugs.winehq.org/show_bug.cgi?id=48023
--- Comment #25 from Louis Lenders xerox.xerox2000x@gmail.com --- (In reply to Lorenzo Ferrillo from comment #24)
Regarding the login part. There seems to be a lot of unimplemented stuffs either in ieframe and in other internet related components (urlmon,wininet, winsock,etc)
Instead of "use embedded browser" you can select "use systembrowser" in the window that comes up under option "settings" or something like that (forgot exact naming).
Anyway, it means this bug has luckily an easy workaround