You access a Microsoft Exchange Server 2010 mailbox by using a Messaging Application Programming Interface (MAPI) client or by using a CDO application. In this scenario, when you copy email messages by using the CopyTo method and try to exclude the PR_SENTMAIL_ENTRYID property, the copy operation fails. Additionally, you receive the following error message:
To resolve this problem, install the following update rollup:
982639 Description of Update Rollup 4 for Exchange Server 2010
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the CopyTo method, visit the following Microsoft Web site: