This is one I haven't seen before. I have an IT admin that needs the right to change users mailbox rights. For instance: Someone leaves the organization and the manger of that individual requests the right to open and look at the emails of the ex-employees mailbox due to business reasons. My Admin can't grant this right through AD. I Delegated him Exchange Admin rights then Full Exchange Admin rights but it seemed to get worse. When he tries granting any permissions in AD at this time the options are greyed out. What could be causing this? I don't believe it's a GPO preventing him from having the right to change things. We're running Exchange 2003 with Outlook 2003 clients on a Windows 2003 AD network.