Can anyone help please? I am trying to add a a user to a windows 10 pc which already has a azure ad account on there from a different organisation. It's a shared PC in the office. Whilst I can see the attempt at logging in on the azure admin panel, it comes up with the following error - 50155 device authentication failure. On the PC it says it can't find the account. Is there something I need to do to allow the device to be registered? I think I have it set where the user can register a device but I'm at a loss.