Thank you very much for your response. I was able to achieve the ~2uA based on your advice.
A worthy note: I setup a almost default setting test and changing D8 to disabled was the key to achieving the 2uA sleep with no other changes other then sleep times. I also did find a documentation note that validates this, “Note If D8 is configured as DTR/Sleep_Request (1), the line will be left floating while the device sleeps. Leaving D8 set to 1 and the corresponding pin not connected to anything external to the device may result in higher sleep current draw.”
Yes Digi Engineering has tested the firmware files and modules for current draw. You will want to contact Digi Technical Support for how to configure the module for the lowest current draw outside of the interface board.