To delete tasks for linked projects in Microsoft Project, you can use either the Delete Task command in the Oracle Projects menu or the Delete key in Microsoft Project.
Warning: Do not use the Edit > Clear > Entire Task function in Microsoft Project to delete tasks from linked projects. If you do, the deletion will not be sent to Oracle Projects when you update, and you will not be able to send revised WBS information to Oracle Projects. If you delete a task using this method, clear the project link and receive the project into a new project.
Oracle Projects uses the business rules defined to verify that you can delete the selected task and then deletes the task in both Microsoft Project and Oracle Projects. See: Deleting Tasks
Deleting a parent task deletes all of its subtasks.
To delete tasks from a linked project in both Microsoft Project and Oracle Projects
In Microsoft Project, open the linked project.
Select one or more tasks to delete.
In Microsoft Project, choose either Oracle Projects > Delete Task, or press the Delete key.
The Delete Task confirmation page only enables you to select for deletion those tasks that do not violate any business rules in Oracle Projects and are otherwise eligible to be deleted.
If a task violates Oracle Projects business rules or is otherwise ineligible for deletion, the page disables its select option and displays an exception reason that explains why the task cannot be deleted.
The selected tasks are deleted from Microsoft Project and Oracle Projects.