New-MailboxExportRequest Fails to grab contacts -Mailbox 'User' -ContentFilter {MessageKind -eq 'Contact'} = 0 contacts

I am attempting to run a script that exports specific mailbox items to a PST. All items export without any issue except Contacts. Running with just contacts specified also retrieves 0 items.

New-MailboxExportRequest -Mailbox 'user' -ContentFilter {((MessageKind -eq 'Email') -or (MessageKind -eq 'Calendar') -or (MessageKind -eq 'Doc') -or (MessageKind -eq 'Task') -or (MessageKind -eq 'Note') -or (MessageKind -eq 'Contact'))} -FilePath 'location'

New-MailboxExportRequest -Mailbox 'user' -ContentFilter {MessageKind -eq 'Contact'}

The only way I can retreive any contacts is to either remove the ContentFilter or to specify -SourceRootFolder '#Contacts#'

New-MailboxExportRequest -Mailbox 'user'  -FilePath 'location'

New-MailboxExportRequest -Mailbox 'User' -SourceRootFolder "#Contacts#" -FilePath 'Location'

Anyone else notice that contacts are not retrieved when using ContentFiltering? Anyone have any ideas on what I should try? Exchange 2010 SP3

Thanks,

Dave