+ Always specify **-M** when connecting to the availability group listener of a SQL Server availability group or a SQL Server Failover Cluster Instance. **-M** provides for faster detection of and connection to the (currently) active server. If **–M** is not specified, **-M** is off. For more information about [Listeners, Client Connectivity, Application Failover](../database-engine/availability-groups/windows/listeners-client-connectivity-application-failover.md), [Creation and Configuration of Availability Groups (SQL Server)](../database-engine/availability-groups/windows/creation-and-configuration-of-availability-groups-sql-server.md), [Failover Clustering and Always On Availability Groups (SQL Server)](https://msdn.microsoft.com/library/ff929171.aspx), and [Active Secondaries: Readable Secondary Replicas(Always On Availability Groups)](https://msdn.microsoft.com/library/ff878253.aspx).
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