I have an Outlook 2010 task that was created in 2015, set to recur weekly. I no longer need this task. I want to end date it with today's date and keep all previous records that I had completed this task. If I change the end date ("end by" today's date), Outlook will recreate this task. How do I end date it and keep the task history?
You'll need to export your recurring tasks to CSV or Excel format and then import back into Outlook. See Changing the End Date on Recurring Appointments.