Consider the following scenario:
- You receive an email message in a Microsoft Exchange Server 2010 Service Pack 1 (SP1) or a later version environment.
- The sender requests a read receipt.
- You move this email message to a personal folder file (.pst) or you move the message to another folder in the mailbox.
This issue occurs because a flag that causes the NRN is set incorrectly when you move the email message to a personal folder file.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.