If your organization authenticates in QuickHelp using a username and password (not Single Sign-On), there is the possibility of users forgetting their passwords and becoming locked out. After 5 failed attempts at authenticating, QuickHelp will lock the user account.
The best way of avoiding this, of course, is to have the user reset his/her password before the 5th failed attempt. However, if they do become locked, all is not lost. They can be unlocked from the QuickHelp Admin Portal.