It is unlikely you will need to use this feature in Arbor. However, please check with each awarding organisation whether they require you to submit forecast grades.
You can enter all forecast grades per candidate, for all their EDI qualification entries. Forecast grades are entered against awards and learning units (components).
Go to School > Examinations > Forecast Grades.
Select the qualification you want to enter forecast grades against.
Then select the award or learning unit that you want to enter forecast grades against.
Once you have entered all forecast grades, you can generate an EDI forecast results file, in the same way that you generate an EDI entry/amendment file.
Go to EDI Exports > Forecast results in order to generate your forecast results EDI file for each awarding organisation.