@Deny Ehrlich -

I’m not sure how to do this for a single board, but in our cases we are assigning access at the project level (so we don’t need to grant/remove access at a per board level). If you do that, then if you click on the project name in the dashboard view, it will bring up a dialog box that will let you review who currently has access to it and will enable you to remove them or change their access level.

Kiron