Export pst error code -2147467259

I am running Exchange 2010 on a Windows Server 2008 R2 Machine. This has worked in the past but I cannot figure out why it's not working now.

I am trying to run this:

[PS] C:\Windows\system32>Get-User | where { $_.Company -ilike "BGCAC*" } | Export-Mailbox -PSTFolderPath E:\PST -Exclude Folders "\Deleted Items" -BadItemLimit 1000 -Confirm:$False -StartDate "05/14/2011 12:01:00"

But I get this for all the users:

Error was found for "this user" because: The operation failed., error code: -2147467259
    + CategoryInfo          : InvalidOperation: (21:Int32) [Export-Mailbox], RecipientTaskException
    + FullyQualifiedErrorId : 941A4C65,Microsoft.Exchange.Management.RecipientTasks.ExportMailbox

I have full access rights and I have Outlook 2010 client installed. I ran an export in Outlook on the server and it worked fine but I need a much larger scale.

Please help.