|Azure Firewall Manager overwrites static and custom routes causing downtime in virtual WAN hub.|You shouldn't use Azure Firewall Manager to manage your settings in deployments configured with custom or static routes. Updates from Firewall Manager can potentially overwrite static or custom route settings.|If you use static or custom routes, use the Virtual WAN page to manage security settings and avoid configuration via Azure Firewall Manager.<br><br>For more information, see [Scenario: Azure Firewall - custom](../virtual-wan/scenario-route-between-vnets-firewall.md).|
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