The easiest way to get this is to use Data Analytics - ERP. Not only can you get a report, but you can also be email when a specified task starts, finished and what the status is.
Thanks for the response, I should have been clearer we have version 9.0 SP3.
There is no Data Analytics int his version
Could you go into more detail on how to accomplish this with Data Analytics? We have it and I can not find anything that looks like it would report back on a task.