Subject of Last Task Completed

Problem

As a Sales/Account Manager, I need visibility on an Account to the Last Task Completed.

Solution

Create a Text rollup of the most recent task completed.

1. Create a Text field on Account (Most Recent Task Completed)
2. Create a Text rollup of the most recent task and add a filter.
   1. Rollup Step 1:  Navigate to Rollup Helper and select Account
   2. Rollup Step 2:  Select the field you created (Most Recent Task Completed)
   3. Select Account Child - Task and select Subject as the field.  Select Text 
   4. Create a new filter:  
      1.  Limit Return to 1 Record
      2. Sort by Last Modified Date in Descending Order
      3. Specify Filter Criteria, Status =  Completed
3. Save the filter, then Save and Run the rollup.