XADM: "MAPI_W_PARTIAL_COMPLETION" Errors, Exmerge Does Not Export Complete Mailboxes (328642)

SYMPTOMS

When you use the Microsoft Exchange Mailbox Merge program (Exmerge) to export mailbox data, you may notice that some messages are not exported to the personal folder files (.pst files). As a result, the .pst files are smaller than the associated mail boxes in the Priv.edb database, and you may find a number of the following entries in the Exmerge.log file generated by the Exmerge process:

Error copying message with subject ?SUBJECT?
(MAPI_W_PARTIAL_COMPLETION)

CAUSE

This issue may occur if a new signature file was recently applied to your antivirus program. When a new signature file is applied, all attachments are re-scanned to make sure that they have been checked against the most up-to-date virus information. The messages are not exported during the Exmerge process because the messages are scanned while Exmerge is running. This issue affects primarily e-mail messages that contain attachments.

RESOLUTION

To resolve this issue, disable your antivirus program, and then run Exmerge again. For detailed information about how to disable your antivirus program, consult your product documentation, or contact the manufacturer of the product.

For information about how to contact the manufacturer of your antivirus program, click the appropriate article number in the following list to view the article in the Microsoft Knowledge Base:

65416 Hardware and Software Third-Party Vendor Contact List, A-K

60781 Hardware and Software Third-Party Vendor Contact List, L-P

60782 Hardware and Software Third-Party Vendor Contact List, Q-Z

MORE INFORMATION

Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

For additional information about problems that may occur when you try to perform MAPI operations on an Exchange Server computer that is running antivirus software, click the article number below to view the article in the Microsoft Knowledge Base:

264731 XADM: MAPI-Based Tasks Do Not Work with Virus API Anti-Virus Software Running on the Exchange Server Computer