Dave, this should work find so long as you’re storing the password in your json file as plaintext and in the “adminPassword” property. However, if you’re exporting a hashed version of the password into one of the Lucee or Adobe specific properties then it won’t work because CFConfig can’t unhash a password to transfer it.
You mentioned cfconfig set and then cfconfig export, but it actually depends on which engine you set it into and whether you started that engine prior to exporting it! (Adobe engines set initially in their config file as plain text, but get auto-hashed the first time the engine starts up, unlike Lucee, which gets hashed immediately upon being set)
Check that you’ve got a plain text password in your JSON file under “adminPassword” and let me know if that still doesn’t work.
Thanks!
~Brad