Since I just became aware that Bluecat is shipping the subscriber version of BIND, which supports EDNS Client Subnet (ECS) for resolver - is adding ECS options supported?  BAM doesn’t natively support any of them, but you could add them using raw options.  We have some use cases that would benefit from ECS but I don’t want to add something in if it’s not officially supported and/or might unexpectedly disappear in future versions.