+Enabling the Azure Firewall on [Azure Key Vault](../key-vault/general/network-security.md) blocks access from Azure Automation runbooks for that service. Access will be blocked even when the firewall exception to allow trusted Microsoft services is enabled, as Automation is not a part of the trusted services list. With an enabled firewall, access can only be made by using a Hybrid Runbook Worker and a [virtual network service endpoint](../key-vault/general/overview-vnet-service-endpoints.md). However, when you enable the Private link for Key Vault, Azure Automation loses access to the Key Vault. Even if you enable a Private link for Hybrid Runbook Worker, it will allow access only to Azure Automation service and not to the Key Vault.
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