Knowledge Base
A stale alternate user reference buried in FaxUtil notification settings causes this failure. It is not visible anywhere in EFM and will block the same user every time until cleared.
When migrating RightFax users between servers or mailboxes, error -9330 ("An ID specified for autoforwarding received faxes is incorrect") is one of the more misleading failures you will encounter. Nothing in the Enterprise Fax Manager console surfaces the setting responsible, and the error message gives no indication of where to look. The root cause is a stale or invalid alternate user configured in the notification settings of the source mailbox, and the fix requires going into FaxUtil directly.