Enable untrusted intranet zone access to Project server

Allows users to access Project Server Web sites and Workspaces that have not been added to their trusted internet zones. If you enable this setting, users can access Project Server and Microsoft SharePoint Foundation sites that are not in their trusted internet zones. If this setting is disabled or not configured, users are required to add the Project Server and Microsoft SharePoint Foundation sites to their trusted internet site zones.

Supported on: At least Windows 7
Registry HiveHKEY_CURRENT_USER
Registry Pathsoftware\policies\microsoft\office\15.0\ms project\security
Value Nametrustwss
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

proj15.admx

Administrative Templates (Computers)

Administrative Templates (Users)