private static void FindWellKnownFoldersWithinInbox(IMailbox mailbox, Dictionary <WellKnownFolderType, byte[]> wellKnownFolders) { byte[] receiveFolderEntryId = mailbox.GetReceiveFolderEntryId("IPM"); if (receiveFolderEntryId != null) { using (IFolder inbox = CommonUtils.GetFolder(mailbox, receiveFolderEntryId)) { if (inbox != null) { FolderHierarchyUtils.FindWellKnownFolders(mailbox, FolderHierarchyUtils.InboxRefs, (PropTag[] pta) => inbox.GetProps(pta), wellKnownFolders); } } } }