Standby-SwyxServer 〉 Requirements for the SwyxStandby option pack 〉 Software
 
Software
Installation of the SwyxStandby option pack requires an operating system Windows Server 2008 R2 or Windows Server 2012. The following databases are supported:
Master
Standby
SQL Server 2014 from Standard Edition
SQL Server 2014 Express incl. "Replication" feature.
* 
If an SQL Express database is used for the standby system, the 'Replication' function has also to be installed.