"MAPI_E_FAILONEPROVIDER" error message when you try to connect to a mailbox on an Exchange Server 2010 server from an Exchange Server 2003 server

You try to connect to a mailbox that is located on a Microsoft Exchange Server 2010 server from an Microsoft Exchange Server 2003 server by using an MFCMAPI application or a similar MAPI application. In this situation, you receive the following error message:

This issue occurs because the MAPI subsystem on an Exchange Server 2003 server is not designed to be used on an Exchange Server 2010 server.

To resolve this issue, use the following Exchange MAPI subsystem on an Exchange Server 2010 server or on a Microsoft Exchange Server 2007 server. To download this subsystem, visit the following Microsoft Web site: Note The Exchange MAPI client and Collaboration Data Objects (CDO) 1.2.1 can be installed only on Exchange 2007 and Exchange 2010 servers. Additionally, it includes the MAPI client libraries and supports CDO 1.2.1. However, you cannot install this download on an Exchange 2003 server.