Exchange 2010 mailbox

Hi -

I have a large Exchange 2010 journaling mailbox (56GB) and cannot access it via OWA or Outlook.  I need to export these messages out.  Can someone assist?
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Patrick BogersDatacenter platform engineer LindowsCommented:

Any chance Outlook 2010 64-bit is installed on that server or in case not, did you try exmerge?

You could export contents of the mailbox to a PST file using the Exchange Management Shell cmdlet New-MailboxExportRequest.
emeka57Author Commented:
The MailboxExportRequest keep failing.

I've tried using Outlook 64-bit on the server as well.  It connects, then hangs.
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Patrick BogersDatacenter platform engineer LindowsCommented:
If you have Outlook on that machine you could use the Export-Mailbox or did you mean this applet by MailboxExportRequest?
Could you please let us know the error you are receiving for MailboxExportRequest?
emeka57Author Commented:
Yes, I meant that by MailboxExportRequest
You could execute the command like the following example.

New-MailboxExportRequest -Mailbox user1 -FilePath “\\CAS1\PSTFileShare\user1.pst” -MRSServer

Here -FilePath refers to a network file share and Exchange Trusted Subsystem should have Read/Write access to this file share.  -MRSServer points to a CAS server in the environment. It is preferred to execute the command from a CAS Server as it uses Mailbox Replication Service for exporting mails.

You need to assign permission to user which you are using for export mailbox using below command:

New-ManagementRoleAssignment –Role “Mailbox Import Export” –User “<username>”

Then you can export mailbox using GUI as per below article:

Exmerge will be a good choice for you (also mentioned by "Patricksr"). With the help of this, you can select the date range to export your large database into small size psts. You will have to rename each set because ExMerge never give an option to choose the name of the export or import file as by default it saves pst file with d<mailboxalias>.pst format.
Also, you can follow this article :

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