I'm trying to follow your instructions, and got you modified .bat file. Thanks for that.
I can connect to Azure Key Vault, but get an error:
"Failed to load signer "signer #1": NONE entry "SigningKey" does not contain a key
Looks like the 'NONE' comes from '--ks NONE' option, and feels like if apksigner is looking for the key in a keystore, and not in key vault. Would you agree ?
Any help would be much appreciated.