When creating a new Security or Distribution group the entry will only be propagated to the Outlook Offline Address Book (OAB) at the operating system or application default sync times Exchange regenerates the OAB – default generation schedule: 24 hours Outlook downloads the OAB – default update schedule: 24 hours So in a worse case it can take up to 48 hours before a user can see a new group in their address book To Force […]