Have a client that every time he closes Outlook, all his cached names disappear. When he starts to type, nothing comes up. It will rebuild itself, or we can force it with a fake email and not send it, but if he closes Outlook 2010 and re-opens it, they are gone.
Have tried to setup a new profile, same problem. Have installed SP1, same problem. He is using suggested contacts and not an n2k file. Using an Exchange 2003 server.