When someone at your company uses technology without formal approval (or without telling anyone), it's called Shadow IT. If you have an IT department, it means that your other employees are using technology that isn't being managed by your resident tech experts - which means they have no control over it. This could be something as simple as an employee using Slack instead of Skype for Business to chat with a coworker, or something more risky like sharing a file externally from a personal Dropbox account. It could also mean unmanaged technology, like using a personal laptop instead of a business computer for work purposes. With an increase of cloud-based software, there's also an increase of employees implementing their own technology solution - without involving the IT department or management.