Hello Guys, Going to say thanks for any input ahead of time. My question is currently we may have a scenario where we have a client using several UAC's registered to the same username. Now what I've seen is that sometimes one endpoint of User A may be NATed, another may be public. This seems to be causing some call flow control issues in a sense for when we handle for NAT / vs NOT NAT, at the time of a request and all of this is in parallel being handled. Example Scenario. User A calls User B -- (both internal). User B has end points X (NAT), Y(PUBLIC), and Z(NAT). So a call is being branched to X, Y, and Z in parallel. Now we fix_nated_contact for endpoint X, next we go to Y, however we've already fixed_nated_contact, thus this call is deemed bad, and then Z continues. Any thoughts / examples / suggestions for these types of scenarios? This is just an example one, one particular case where issues we have seen is more like follows: PSTN Calls User B (external to internal) User B has the same previous end points (X,Y,Z) + (PSTN End Points that we are adding in parallel to fork to). Same type issue, same type scenario. The end result of the issues are lack of audio, mis routed contacts, etc. So any help and input is appreciated, thanks!