There is one user who set incoming mail to PST. She complained that some mails are missing (not reach her PST), I did configured incoming mail to her mailbox and sent several test mail. The mail will stay in inbox for while before disappeared. I check the Outlook rules and alert, there is no rules.
I tried to use MFCMAPI to delete hidden or corrupted rules. My problem that I not if IPM.ExtendedRule shall be deleted since based on below article,they said just delete IPM.Rule.Message ONLY but another article said delete both.