That seems odd that you are unable to check the boxes. Does this work in any other browsers? I would recommend sending this in to our support team at firstname.lastname@example.org. Be sure to include as much information as possible.
Has anyone determined a resolution for this? I am experiencing the exact same issue.
I did not receive a response for this issue. In order to clic the checkbox and edit users, groups and projects i just installed Mozilla Firefox 20.0.1 and now i am able to select the checkbox and edit users, groups and projects.
I guess this is not a definitive solutions but i can select these options now.
What version of Tableau Server do you have installed?
I ran into the same issue with v8.0.0 using IE 7 (Win2008R2). I did not have the same problem using Chrome or Firefox. I've since upgraded to Tableau Server v8.0.3 and I don't recall having this problem with IE.