Add additional fields to "Edit Test Case using Grid" option in VS Team Services
Not many people know that you can extend this grid easily to bulk-edit additional fields, like Area Path, Assigned To or any other field which exists on the Test Case work item.
To do so, open the Column Options:
Now when you open the Grid View you'll notice that the additional columns are showing on the right side of the grid:
Specify these fields on the same line you're setting the Title of the Test Case and the field values will automatically be set: