You have a server that has Update Rollup 3 for Microsoft Exchange Server 2007 Service Pack 3 (SP3) installed.
You use a Mac Mail client to send an email message that includes a PDF attachment to a mailbox on the server.
You open the email message by using Outlook 2010.
In this scenario, the PDF attachment in the email message is not displayed.
Note The PDF attachment is displayed when you open the email message by using Outlook Web Access (OWA).
To resolve this issue, install the following update rollup:
2509911 Description of Update Rollup 4 for Exchange Server 2007 Service Pack 3
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.