Sometimes, when you are adding a new user, the user account will not be created and the following message will appear:
A user with this user name already exists. All ShareVision users share a common pool of user names and user names must be unique. It's possible that the user name you entered has been taken by another organization. You may need to stray from your user naming convention for this user by adding a middle initial or some other small change. Please contact ShareVision support if you have further questions.