We have set up a course with the completion policy set to:

Manual completion by others.

From an external training institute we receive the information about the completion status of a learner.
When received, we set the course to complete for the learner in question.

As the course is set to complete, the completion date is set to the day we mark it as complete.

We want to change this date to the date delivered by the external training institute.

We know we can change this at database level, but that is not the preferred way.

Is there a way to change this date in the UI or is there another way to store the actual completion date is Totara?

Thanks in advance.

Danny