This article will show you how to Export \ Import Exchange Server 2013 or 2010 Contacts subfolders.
To start use the Export cmdlet below
Export
New-MailboxexportRequest USERID-IncludeFolders “contacts/*” -ExcludeDumpster -FilePath \\SERVERSHARE\pst\FILE.pst
When done use the Import cmdlet
Import
New-MailboxImportRequest USERID -FilePath \\SERVERSHARE\pst\FILE.pst