Microsoft KB Archive/893707

= You cannot use client certificates that are installed on the PocketPC device to authenticate when you connect by using EAS =

Article ID: 893707

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Exchange Server 2003 Enterprise Edition
 * Microsoft Exchange Server 2003 Standard Edition

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SYMPTOMS
When you use Microsoft Exchange ActiveSync (EAS) with a PocketPC 2003 device, you cannot use client certificates that are installed on the PocketPC device to authenticate when you connect by using EAS.



CAUSE
The EAS client program does not support using client certificates for authentication. The EAS client uses username and password authentication.



MORE INFORMATION
While PocketPC 2003 and Microsoft Windows Mobile 2003 support the use of client certificates, the EAS client and Pocket Internet Explorer components do not. Windows Mobile 2003 VPN and WiFi technologies can use personal certificates for authentication.

For additional information about how to configure client certificate mappings, click the following article number to view the article in the Microsoft Knowledge Base:

313070 How to configure client certificate mappings in Internet Information Services (IIS) 5.0

Keywords: kbtshoot KB893707

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