Important: Currently not compatible with IPS 4.3. For more details, see this topic:   With IPBWI for WordPress v4, you will get flawless Single Sign On. How does SSO work? IP.board brings a SSO API which allows to add several "slaves" as satellites to a "master" IP.board installation. This results in a robust single sign on solution allowing unlimited slaves even on completely different domains - same origin policy which normally breaks setting cookies for different do