Article ID: 2620361 - View products that this article applies to.
Consider the following scenario:
This issue occurs because the encrypted or digitally-signed message is not correctly rendered when S/MIME control is installed.
To resolve this issue, install the following update rollup:
(https://support.microsoft.com/kb/2645995/ )Description of Update Rollup 1 for Exchange Server 2010 Service Pack 2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about Outlook Web App and S/MIME, visit the following Microsoft website:
General information about Outlook Web App and S/MIMEFor more information about Outlook Web App and S/MIME, visit the following Microsoft website:
General information about how to enable or disable S/MIME in Outlook Web App
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.
Article ID: 2620361 - Last Review: February 16, 2012 - Revision: 2.0