where is the XBEE commissioning button

I have XBEE modules that are configured to sleep and I’m trying to reconfigure them but cannot discover them using X-CTU.
I get a message saying that I have to press the commissioning button to be able to discover them.

There is no button on the XBEE modules. Can you kindly clarify what needs to be done exactly? Where is the commissioning button that is mentioned in your documentation and how can i activate it?

Best Regards,

DIO 0 is generally the commissioning line.

You must attach your own physical line to D0 to activate it. Some USB interface boards come with one already.