SmartSheet security non licensed user w/ personal Smartsheet license
Recently I learned that a non-licensed staff member was able to copy a project sheet, create their own and then delete all of the information in the project account. I learned today that this person purchased a personal Smartsheet license. This allowed him to create new sheets in our business account workspace. This seems like a security issue if non-licensed users are able to circumvent the licensing issue if they are willing to purchase themselves. I looked at the users and now they are not on the account though have been shared workspaces for the past month. They said they used their work email for this (but I know they have multiple emails). He is still on the project and will need to access our workspaces, however, how can I keep him from creating sheets within the business account?