-If you are using [Virtual Network service endpoints and rules](sql-database-vnet-service-endpoint-rule-overview.md) to restrict access to your SQL database, be aware that Each Virtual Network service endpoint applies to only one Azure region. The endpoint does not enable other regions to accept communication from the subnet. Therefore, only the client applications deployed in the same region can connect to the primary database. Since the failover results in the SQL client sessions being rerouted to the server in the different (secondary) region, these sessions will fail if originated from a client outside of that region. For that reason, the automatic failover policy cannot be enabled if the participating servers are included in the Virtual Network rules. To support manual failover, follow these steps:
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