Consider the following scenario:
- You are assigned the "Full Access" and "Send on Behalf" permissions on a secondary mailbox in a Microsoft Exchange Server 2010 environment.
- You use Microsoft Outlook or Outlook Web App to log on to the secondary mailbox by using your own credential.
- You send an email message from the secondary mailbox.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.