Regarding the Customization Options for Workflows and Activities - You can now create custom activities and workflows in Password Manager. An embedded user interface designer allows you to easily create user interface for your custom activities. You can also convert any built-in activity to custom and modify its behavior by PowerShell scripts. The import/export functionality enables you to share custom activities and workflows with Password Manager instances outside of the replication group.
This feature requires One Identity Consulting Services (PSO) assistance and is not covered by the technical support.
Another resource would be the Password Manager Forums: