I'm new at this and trying to learn one step at a time...
I'm using a pair of XBee S2 modules (not X2C) and XCTU v6.4.3. I've been able to get the modules to talk in transparent mode, then API mode. Next, I'm trying to configure encryption, but the EE option doesn't show up in XCTU.
Do these modules support encryption? Let me know what other info might be helpful and I can try to supply it.
One more note (not sure if it's relevant): I had to download the "legacy firmware" for XCTU to recognize my modules.
Thanks for any guidance you can provide!