You must be an administrator (i.e. have administration privileges for the account) the user is associated with.

Unlock Another User Under your Account

1. Sign in to the Business Center
2. Select Account Management > Users.
3. Select the checkbox(es) next to user(s) you want to unlock.
4. Click Enable button on the top right of the user table to enable the selected user(s).
   1. Additionally you may click on the User Name and on the User Profile page at the top right clicking on Profile status and select enable to unlock the user this way as well.