On the eleventh day of NAVmas Microsoft gave to me, Extensions

Modify your Microsoft Dynamics NAV system without directly altering the source resources, making it easier to deploy, manage, and upgrade customizations or extensions. Navigate through an install with only a few clicks and easily view extension information, such as name, description, version, publisher, and links. You can also install or uninstall extensions easily using the Extension Management page and quickly choose the extensions you want using the easily-recognizable logos.