Last Week I had into the problem that Outlook 2010 didn’t show some attachments. After a research on technet I found out that this attachment was a not referenced inline-attachment.

To fix this behavior and make Outlook showing the attachment you have to do the following:

- Stop the Exchange Transport service.
- Locate the EdgeTransport.exe.config file. This file is located in the following path:
C:\Program Files\Microsoft\Exchange Server\Bin\

In the EdgeTransport.exe.config file, add the following entry between the

<appSettings> element and the </appSettings> element:

<add key="TreatInlineDispositionAsAttachment" value="true" />

- Start the Transport service


This post has been migrated from our earlier blog based on BlogEngine.NET.