How to block any wpmu user?

Hay!
Today I want to block an user of my WordPress MU user.
To Block an user of your MU site, Just follow the following instruction.

1. Login your site as super admin.
2. Go to Users list from super admin dashboard.
3. Select the users that you want to block
4. Click Edit
5. Scroll  the user Role Drop down  List box and set the value “Blocked“.
6. Then Click Update User Button bottom of the page.

Your user has been blocked now. From now your user unable to login dashboard.