People picker address book not up to date for some users, MOSS 2007
We have a Sharepoint Infopath form that has a people picker on it. We are running MOSS 2007. Every now and then we have a user who cannot see his name in the address book. We have tried setting compatibility mode and clearing cache. I think it is something on the local machine because one user had it and then he got a new PC and the issue went away. Those of us on other PCs can see his name. Is something cached and if so, is there a way to clear it on his local machine?