Returns the maximum number of simultaneous user connections allowed on an instance of SQL Server. The number returned is not necessarily the number currently configured.
The actual number of user connections allowed also depends on the version of SQL Server that is installed and the limitations of your applications and hardware.
To reconfigure SQL Server for fewer connections, use sp_configure.
The following example shows returning the maximum number of user connections on an instance of SQL Server. The example assumes that SQL Server has not been reconfigured for fewer user connections.
SELECT @@MAX_CONNECTIONS AS 'Max Connections';
Here is the result set.
Max Connections --------------- 32767