Trying to apply regedits via GPO to Outlook

I am trying to apply regedits via GPO for Office Outlook to direct sent mails to shared mailboxes sent items box when shared mailbox is used using register items described here http://community.office365.com/en-us/forums/158/p/193942/578860.aspx#578860 and herehttp://support.microsoft.com/kb/2843677/en-us. We have Office 2013.

For GPO I found instructions from here http://social.technet.microsoft.com/Forums/windowsserver/en-US/83eb3681-5349-4353-b3ad-65b06b9cb3c0/applying-registry-edits-via-gpo?forum=winserverGP but there is no Office folder inHKEY_CURRENT_USER\Software\Microsoft folder. I am using Win2012R2 server.

How to get these regedits done?