For some reason my laptop users are unable to download the offline address book. After trying, when they open it, it is blank. I have selected in Exchange to have the OAB generated from the Global Address book, that didn't work. I have also created another recipients container and pointed OAB generation to that container, still no go. Running Exchange 5.5SP4 on Win2K server. Could the OAB on the server be corrupt, and is there a way to deleted the OAB that was generated on the server and recreate it? I can find nothing on this subject except deleting OABs on the laptops themselves, nothing on the OAB generated on the server. Paul Maglinger