In the Database tab of the Configuration page, select one of the following database drivers.

• Database Appliance
• Microsoft SQL Server
• Oracle
• PostgreSQL

Specifically:

• When selecting PostgreSQL or the  PKI DB Appliance, the PKI Hub base installation and Validation Authority databases can share the same DBMS.
• When selecting another DBMS for Validation Authority, you still need PostgreSQL for the PKI Hub installation database.