The audit warns when multiple DM senders share the main session and recommends **secure DM mode**: `session.dmScope="per-channel-peer"` (or `per-account-channel-peer` for multi-account channels) for shared inboxes.
For webhook ingress, it warns when `hooks.defaultSessionKey` is unset, when request `sessionKey` overrides are enabled, and when overrides are enabled without `hooks.allowedSessionKeyPrefixes`.