Distributes the changes to total actual cost evenly across the schedule to the status date (or to the current date if you ...

Distributes the changes to total actual cost evenly across the schedule to the status date (or to the current date if you have not specified a project status date).

If you enable this setting, Project will distribute edits to actual cost evenly across a task up to the status date.

If you disable or do not configure this setting, the user's default setting is used.