Hi, Following Anthonys advise to configure a bridged dial plan infront of sipX socket based apps proves to be a reasonable approach to let attended transfer work for our apps. However, bridged dial plans for the auto-attendant has a side effect. sipX uses blind transfer to forward a caller to its intended destination. sipX proxy would then authenticate the user if it has proper permission to reach the resource as it receives to new INVITE as a result of the blind transfer. Since the call is bridged, b-leg will consume the REFER and send its own INVITE which doesn't have the notion how to authenticate against sipX. My question is is there a way to propagate the REFER to the caller instead of being consumed by the bridge? Thanks for any advise in advance. Joegen