"Policy ArmResourceId has incorrect formatting" Has Nothing to Do With ARM Resource IDs

Policy ArmResourceId has incorrect formatting — an Azure CLI error message that cost me a whole debugging session, when the real reason was just a hyphen in the policy name. Hi everyone 👋 Setting up an Azure Front Door WAF Policy through the CLI, I ran into an error that — as it turns out — a lot of other people have been hitting for over three years, ever since it was first reported back in December 2022.