| `IsHadrEnabled` | **Applies to**: [!INCLUDE[ssSQL11](../../includes/sssql11-md.md)] and later.<br /><br />[!INCLUDE[ssHADR](../../includes/sshadr-md.md)] is enabled on this server instance.<br /><br />0 = The [!INCLUDE[ssHADR](../../includes/sshadr-md.md)] feature is disabled.<br /><br />1 = The [!INCLUDE[ssHADR](../../includes/sshadr-md.md)] feature is enabled.<br /><br />NULL = Input isn't valid, an error, or not applicable.<br /><br />Base data type: **int**<br /><br />For availability replicas to be created and run on an instance of [!INCLUDE[ssNoVersion](../../includes/ssnoversion-md.md)], [!INCLUDE[ssHADR](../../includes/sshadr-md.md)] must be enabled on the server instance. For more information, see [Enable and Disable Always On Availability Groups (SQL Server)](../../database-engine/availability-groups/windows/enable-and-disable-always-on-availability-groups-sql-server.md).<br /><br />**Note:** The IsHadrEnabled property pertains only to [!INCLUDE[ssHADR](../../includes/sshadr-md.md)]. Other high availability or disaster recovery features, such as database mirroring or log shipping, are unaffected by this server property. |
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