Wednesday, October 10, 2012

Exchange PST Capture Tool: Import error: Error opening mailbox

Today a customer consulted me to import 600 mailboxes into Microsoft Exchange from PST files scattered across the network.  However when performing the import into Exchange the following error was experianced:

Import error: Error opening mailbox


Now this error ususally occurs when the user does not have Mailbox Import Export permissions. This can be assigned to a user using the following PowerShell command:

New-ManagementRoleAssignment -Role "Mailbox Import Export" -User "PSTImportUser"

However in my case this was not the problem.  I found out the hard way that you must have a 64bit version of Outlook installed on the PST Importer server.  My version of Outlook was 32bit hence causing the error.

2 comments:

  1. Does this mean that even if the PST file originates from a 32bit Outlook that a 64bit Outlook is needed on the PST importing machine? I am experiencing the same issues as you are.

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  2. Hi Douglas, you just need to ensure the mailbox user on the Exchange server which your doing the importing from has Mailbox Import Export rights assigned to it with the command above.

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