Another new feature that Windows brings 2008 R2, is the ability to join a domain offline, This is, we don't need to have connectivity between the computer and the domain controller to join, avoiding traffic between both devices. This is ideal when deploying large numbers of computers or sending them to our branch offices ready to be started (generated from images), so that we don't have to join them to the domain from there and can join them using AIK through an answer file (For example).

We will only be able to join computers with Windows using this new technology 7 o Windows 2008 R2, and we can join earlier domain controllers before Windows Server 2008 R2 using the parameter (/downlevel).

En el controlador de dominio crearemos la cuenta de equipo mediante el comando: djoin /provision /domain NOMBRE_DOMINIO /machine NOMBRE_PC_A_UNIR /savefile FICHERO [/machineou UO_DE_EQUIPOS] [/dcname NOMBRE_DEL_DC] [/reuse] [/downlevel] [/defpwd] [/nosearch] [/printblob]

Enviaremos el fichero generado desde el controlador de dominio al equipo a unirse, bien por correo ordinario, bien mediante Windows AIK, mail… y para unirlo sin conexión ejecutaremos: djoin /requestodj /loadfile FICHERO /windowspath PATH_WINDOWS /localos

Tenemos más información en la web oficial de Microsoft: http://technet.microsoft.com/es-es/library/dd392267%28WS.10%29.aspx