Modify DCUI access list

In vSphere 6 or prior, by default ROOT is the user who has access to DCUI, even in the lockdown mode. If I wish to add additional users in this list, how to do it?

Using vSphere Web Client

Select your host, go to Manage->Settings->Advanced System Settings and try to locate DCUI.Access parameter as shown in following screen

Screen Shot 2015-06-06 at 8.12.32 am

now Click on EDIT button

it will bring  a screen like following where you use comma as separator to mention more usernames. when done, click on OK.
Screen Shot 2015-06-06 at 8.18.18 am