If you have an employee who has left the company and you want them to be completely removed from accessing any of your Team Storms, please got to
https://stormboard.com/team/account and click on the Users tab.
You can either scroll through the list or search for the specific user.
Click the actions menu located on the right hand side of the user's name and select "ban user".
The user will be removed from all team Storms and won't be able to join any Storms on the team ever again. The ban is permanent so only use it for people that you want to keep permanently out of your Storms.
If the person is still with your company and you simply want to remove them temporarily from your bill, refer to this article: How do I disable users on my team?