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There is no supported method for programmatically setting the Password used by the Exchange ActiveSync client on Windows Mobile 5.0, Windows Mobile 6.0, Windows Mobile 6.5, and Windows Embedded Handheld 6.5 based devices.
Exchange ActiveSync (EAS) is a Microsoft proprietary protocol for synchronizing email and calendar items. It is typically used for over-the-air synchronization between a server and mobile devices such as Microsoft’s Windows Mobile 5.0, Windows Mobile 6.0, Windows Mobile 6.5, and Windows Embedded Handheld 6.5.
An EAS client program which runs on Windows Mobile/Windows Embedded Handheld (WM) based devices handles communication with the server using the EAS protocol. Many of the parameters which the EAS client uses to communicate with the server may be modified programmatically by using the Sync Configuration Server Provider. See the SDK help documentation for your specific WM platform for more information about programming with the Sync Configuration Server Provider.
Three parameters (among many others) which may be programmed in this way are the Domain, Server, and User parameters. These three parameters are necessary for establishing a user-based authenticated partnership with a server which supports the EAS protocol. A fourth parameter, Password, is also necessary for establishing a user authenticated partnership with a server over the EAS protocol. There is no supported method for programmatically configuring the Password parameter on WM based devices.
An alternative to user-based authenticated partnerships is certificate-based authenticated partnerships. For more on Exchange ActiveSync certificate-based authentication, please see the TechNet article Deploying Exchange ActiveSync Certificate-Based Authentication.
A partial alternative to the EAS protocol is the POP3 protocol. The POP3 settings on WM based devices may be programmeed using the EMAIL2 Configuration Service Provider. See the SDK help documentation for your specific WM platform for more information about programming with the EMAIL2 Configuration Server Provider.
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