On Internet Explorer 11 some users are having problems logging in to the Canvas application. After entering their credentials it's not logging in but to do that they have to remove '/#/login/dev' from the url.
Even weirder is the behaviour in Edge or on some laptops with Chrome: after entering their credentials they are redirected to https://www.google.be/.
Most of the users don't have these issues using IE 11.
What could be the reason for this?