How do I add a message that gets displayed to all employees when they login?

A message can be added that gets shown to the employees after they login and before they reach their dashboard.  To do this go to Admin > Settings and write the message in the Login Message field and click submit.  This will continue to be shown every time your every employee logs in until the message is removed.

When the login message is shown the user will have to click the Enter Site link to continue to the dashboard.