The Office 2013 Preview release includes Administrative Templates (ADMX, ADML) and Office Customization Tool (OCT) files which administrators can download here: Office 2013 Preview Administrative Template files (ADMX/ADML) and Office Customization Tool. Included in this download is an Excel spreadsheet (office2013grouppolicyandoctsettings_reference.xlsx) that lists the Group Policy and OCT settings. The policy settings apply to both Windows Installer-based (MSI) and Click-to-Run Office 2013 Preview installations.
To learn about new settings related to Office 2013 access to services, Add-ins management, Office Start, Office templates and backgrounds, OneNote synchronization, Outlook, sign-in, and Telemetry Dashboard, see Office 2013 Administrative Template files (ADMX, ADML) and Office Customization Tool.
For more information about Outlook settings, see What's new in Outlook 2013 Preview.