To revoke a user's access to a group, two options are available: either block the user by changing their user role, or remove them from the group entirely. To remove a user from a group, navigate to Group Members within the Configuration tab. Alternatively, navigate to the group within the Groups drop-down and click Manage Members.
Click Delete to remove the user from the lab.
Note: if this user has samples stored in the lab, you will receive a notification about handling stored samples. Make sure to change ownership of the user's samples before removing them from the group.