Outlook 2010 - Export a large mailbox to a PST file

Our email is hosted with Office365 and we use Outlook 2010 as our email client on our workstations.  I have a user that has a very large mailbox (9+ GB).  In an effort to get her email cleaned up, I was trying to make a copy of her current email account and copy it to an external hard drive.  I have full access to her email and I tried exporting her email folders to a PST file on my desktop.  The process ends with an error and does not complete successfully.  I was trying to copy the email account before working with her to clean up her mailbox.  Any suggestions on how I can get a copy of her email account in PST format?  The copy would be used in case we have to connect to that PST file to search for an email that may be needed in the future.  Thanks
mmj1Asked:
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Murali ReddyExchange ExpertCommented:
Split and export to different PSTs folder wise. It will also helps to stop the PST corrutpion as well, more the size, more prone to corrupt.
mmj1Author Commented:
Please provide a little additional assistance.  How would I split up the export?  Can I select only certain folders to export?  Do I check or uncheck "include subfolders" - thanks
Murali ReddyExchange ExpertCommented:
I assume you have office 2010, or change the options accordingly with for outlook 2013.

Create a new profile preferable for that mailbox in question. From the File menu-->Open
 
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Choose one by one, based on the size of the folders.
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Browse and change the pst path every time, so that they exported to a new pst.
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Finish it.

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mmj1Author Commented:
Thanks for the info - so far it did work successfully on the user's inbox.
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