IMPORTANT: Please do not delete users. Instead, deactivate them.
To Deactivate / Activate a User
Step 1: Select Security.
Step 2: Locate the User in the User List.
Step 3: Select the appropriate User.
Step 4: Under Permissions, click the dropdown arrow and select Inactive or Active.
Note: If you are activating a user who also exists in another site, you may encounter a pop-up notification. If you have issues and are not able to activate the user, please submit a support ticket.