Consider the following scenario:
- You apply Microsoft Exchange Server 2010 Service Pack 3 (SP3) on a Windows Server 2012 server.
- You create a Rich Text Format (RTF) email message and insert a picture into the message body.
- You try to send the email message to an external recipient.
Last error: A storage transient failure had occurred during content conversion.
This issue occurs because Windows Server 2012 uses a new behavior in the transport pipeline.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.