Hi Fletch - I read your post on Network Virtual Office and you were mentioning INAC as a requirement. We have a network of CS1000 systems and our ESN dialing plan is UDP, using SIP trunking, but rather than using INAC on our SIP routes, we use a DMI on each location code to manually insert our ESN AC2 on the originating node, and then our UDP routing entries in our NRS include the AC2 (e.g. 6222, 6393, 6395 etc.) It's a bit weird, but works fine for VoIP calling between CS1000 systems, but we get "Invalid ID (3)" when attempting to do Network Virtual Office between systems. Before we invest the time to redo our entire dial plan and SIP trunk configs, can you confirm that using INAC instead of DMIs and removing the AC2 from our NRS UDP routes will allow Network Virtual Office to work?