I found that you were atleast able to try the XBee Pro Series 2B modules out. You may be able to help me.
I was just able to independently detect two of them one-by-one on XCTU-v6.1.1 and then when I used two USB cables, I was able to detect only one radio module. FYI, I am using USB explorers from sparkfun both of which give characters back on loopback (DOUT <--> DIN).
Both modules were ZigBee Router AT when I had detected them independently.
But now, both of them don't get detected. XCTU always asks to do reset and wait for 10 seconds. I tried all methods of recovery and resetting like removing slowly the module from adapter and insert back with RESET connected to GND; I used either both or one of these techniques for resetting. Today I started trying with a bread board.
If you could guide me as to how to proceed, it would be great.
Have I damaged my modules?