All users are being kicked out of the Web Client after they have been logged in. The time can vary and its hard to see exactly how long they are logged in first. It happens to me when I get on the web client after closing the browser for the night and not logging out.
So users will be using the client, then go do something else, come back and its logged out. The Auth Token Lifetime is 2 days, session idle timeout is 36 hours (Testing to see if that helps, but that time didn't). Zmprov ga shows the right times.
Its not a show stopper or anything, just annoying for them and they complain to me
I've searched around, but can't find this anywhere else.