Is Dockit Server Agent component mandatory?
Dockit Server Agent is an optional server-side component that must be installed in each front-end web server or application server in the case local SharePoint farms.
Dockit application has been designed to work without installing Dockit Server Agent in the SharePoint farm, especially in the context of Office 365 or hosted SharePoint servers. However, there are certain caveats.
You will see the best results if you install Dockit Server Agent in the SharePoint server, especially when want to retain the Created Date, Last Modified Date, Created By, Modified By, Content Approval, Target Audience, and Business Data Column (BDC) values of folders / files / list items as in the source location (without any discrepancies).