Microsoft KB Archive/818042

= XADM: Error in MAPI32.dll When You Back Up Mailboxes By Using ARCserve 2000 =

Article ID: 818042

Article Last Modified on 2/16/2007

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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SYMPTOMS
When you try to back up your Microsoft Exchange Server 5.5 mailboxes by using the BrightStor ARCserve 2000 backup program from Computer Associates, you receive a Dr. Watson error message in MAPI32.dll during the backup operation. You can successfully back up the Exchange information store by using the Backup program.

This issue occurs if you try to perform an individual mailbox-level backup (also known as a brick-level backup) in ARCserve 2000.

Note This issue occurs if you perform only a brick-level backup, or if you perform a brick-level backup together with a full Exchange online backup. However, if you perform the brick-level backup to back up 10 or fewer mailboxes, you may not experience this issue.



CAUSE
This issue occurs because ARCserve 2000 uses impersonation to access the individual mailboxes. Exchange 5.5 does not support impersonation in a thread in MAPI. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

821470 Impersonation of User in Code May Cause Outlook to Stop Responding or Cause Method Failed Error Message



RESOLUTION
To resolve this issue, contact Computer Associates to inquire about an update for the ARCserve 2000 program. For information about how to contact Computer Associates, 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

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.



MORE INFORMATION
Microsoft recommends that you use the IExchangeManageStore::CreateStoreEntryID method to programmatically access multiple mailboxes in the information store. For additional information about this method, visit the following Microsoft Web site:

http://msdn2.microsoft.com/en-us/library/ms985979.aspx

For additional information about how to log on to a mailbox by using the IExchangeManageStore interface, visit the following Microsoft Web site:

http://msdn2.microsoft.com/en-us/library/ms869712.aspx

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.

Additional query words: crash

Keywords: kbprb KB818042

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