FMS13.0v9, Windows 10 build 1607 (Anniversary Update), FMP13.0v9 Windows 10 build 1511.
This is an occasional use system for a very few users, hence not using Windows Server.
A few weeks ago everything was fine, on Friday when user tried too connect she was surprised to be asked to login - previous SSO had been working transparently.
Does anyone have an idea of what would cause SSO to stop working? If the user enters her account name/password as per SSO then she can sign in as before.
We have restarted both 'server' and client to no effect