Genesyscloud_messaging_facebook 400 on webhook_url with custom domain

Having some config trouble here…

  • Provider: genesyscloud v1.68.4, Region: AU-1
  • Error: 400 Bad Request: The provided webhook_url is not valid for the specified domain.
  • HCL snippet:
resource "genesyscloud_messaging_facebook" "fb_conn" {
name = "Prod FB"
page_id = "123456789"
access_token = var.fb_token
webhook_url = "https://hooks.ourdomain.com/genesys"
}
  • The URL resolves and returns 200 via curl from the VPC.
  • Is there a specific allowlist or DNS TXT record required for custom domains in Digital Messaging?