KB ID : 91
Published : Jan. 22, 2016
Created : Jan. 22, 2016
Last Modified : June 26, 2016

Cause

The error message would occur while trying to backup the Exchange Mailbox when ‘MSPST MS’ service is not configured in the Exchange Server. You can confirm if the MSPST MS service is configured by checking for the MSPST MS entry in the MAPISVC.INF file. The MAPISVC.INF file is usually located in the Windows system directory (e.g.C:\Winnt\System32).

Solution

This issue should be resolved if you add the ‘MSPST MS’ service by modifying the MAPISVC.INF file. The MAPISVC.INF file should have the information of the Microsoft Personal Folder store service. If this file does not have this information, then the Exchange Mailbox dump would fail with an error indicating that it is unable to create the PST file.

If you have installed Outlook on the Exchange Server machine, MAPISVC.INF file may also exist in the common system program files area (e.g. C:\Program Files\Common Files\System\Mapi\1033). If you have multiple versions of this file in your machine, verify that they are identical. Verify if the file has an entry for the Microsoft Personal Folder store service. You can determine this by looking for the following information. If this information is not in the file, then you need to add it in the proper sections:

Note : Please take copy of your “mapisvc.inf” file before making any changes.

[Services]

MSPST MS=Personal Folders File (.pst)

[MSPST MS]

Providers=MSPST MSP

PRSERVICEDLL_NAME=mspst.dll

PRSERVICEINSTALL_ID={6485D262-C2AC-11D1-AD3E-10A0C911C9C0}

PRSERVICESUPPORT_FILES=mspst.dll

PRSERVICEENTRY_NAME=PSTServiceEntry

PRRESOURCEFLAGS=SERVICENOPRIMARY_IDENTITY

[MSPST MSP]

34140102=4e495441f9bfb80100aa0037d96e0000

PRPROVIDERDLL_NAME=mspst.dll

PRSERVICEINSTALL_ID={6485D262-C2AC-11D1-AD3E-10A0C911C9C0}

PRRESOURCETYPE=MAPISTOREPROVIDER

PRRESOURCEFLAGS=STATUSDEFAULTSTORE

PRDISPLAYNAME=Personal Folders

PRPROVIDERDISPLAY=Personal Folders File (.pst)

For more information about the format of the MAPISVC.INF file see the following Microsoft article:

http://support.microsoft.com/kb/294470

After modifying the mapisvc.inf file, try scheduling the backups.

Refer the following help document for more information on adding the MSPST MS Services to the mapisvc.inf file:

http://account.vembu.com/help/vembu-h...

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