New message disappears from INBOX OUTLOOK 2000 if reply or forward it

HICan you explain your Messaging Environment to future analyzes.1) What is your Exchange server version and SP level?2) What is Domain controller and OS version of Exchange installed server?3) This problem is affected to all users, few users or one user?4) Any event errors happen recently?Regards & ThanksChinthaka

HIThis situations might be happen when apply filters to outlook.Check your View to ensure it has not been changed to Unread Messages. RegardsChinthaka

Hi Any updates on this matter ? RegardsChinthaka