Symptoms
On new WPE node deployement, custom MS SQL instance name entered into extended paramemetrs of the wizard is ignored.
Cause
The wpe_SQL_deploy.ps1 script uses hard-coded instance name MSSQLSERVER. Such behaviour is considered to be a software issue #POA-96052.
Resolution
The issue is planned to be fixed in one of the future product updates. Until the issue is fixed, only hard-coded instance name MSSQLSERVER is available for WPE database.