You cannot connect to an Exchange Server 2003 computer by using Outlook Mobile Access

When you try to access a Microsoft Exchange Server 2003 computer by using Outlook Mobile Access (OMA), you cannot successfully connect.

This behavior may occur if both of the following conditions are true for Outlook Mobile Access connections:

• The Exchange Server 2003 computer is configured to require Secure Sockets Layer (SSL).
• The Exchange Server 2003 computer is configured to use a GTE CyberTrust certification authority (CA).

Some handheld devices do not contain a certificate for GTE CyberTrust. Because of this, they cannot use Outlook Mobile Access to successfully connect to the Exchange Server 2003 computer when a GTE CyberTrust certificate is required.

This behavior is known to occur on some KDDI and NTT DoCoMo, Inc. mobile phones when a GTE CyberTrust certification authority is used.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.