When trying to add users to a public folder, I found that some have the prohibit symbol. What is that? I found a KB article that discusses it, but I have rights to the public folder. I can add other users. I can't grant the users with the prohit symbol rights to the PF through the GAL, but I can do it through powershell. http://support.microsoft.com/kb/941318 Anyone know what that symbol means?

It sounds like there's an explicit Deny in there somewhere.