How many secondary replicas are supported by an AlwaysOn availability group?

How many replicas can I have in an AlwaysOn availability group?

Up to eight secondary replicas are supported, including one primary replica and two synchronous-commit secondary replicas.

How many synchronous secondary replicas can I have in always on?

To configure an availability group for automatic failover, you need to set both the current primary replica and at least one secondary replica to synchronous-commit mode with automatic failover. You can have up to three automatic failover replicas.

How many replicas can I have in an AlwaysOn availability Group 2016?

Limit of two replicas (primary and secondary).

How many secondary replicas are there in SQL Server 2016?

Up to 8 secondary replicas, including 2 synchronous secondary replicas (SQL Server 2016) Up to 8 secondary replicas, including 2 synchronous secondary replicas (SQL Server 2017) Up to 8 secondary replicas, including 5 synchronous secondary replicas (SQL Server 2019)