Enabling Marking Workflow in a Moodle Assignment is an optional workflow that requires grades to go through a series of stages before they're released to students. This allows for multiple rounds of marking.
You must start the workflow by first hiding the assignment grade item from students.
You must hide the individual assignment grade item while you are marking to ensure that marks and feedback are released at the same time to all students. To do this:
Scroll to the bottom of the page. Select the downward arrow alongside With selected...and select Set marking workflow state.
As you mark student assignments, you can change the workflow state.
If Marking workflow is set to yes from within a Moodle assignment settings, and the marks have been released, the External Examiner cannot view the submissions unless marking allocation has been used.