Hi,
You want to select E objects related to the associated B object of A.
Create a data source microflow.
Retrieve B over association from A.
Retrieve C over association from B.
Retrieve a List of D over the association from C.
Create a list of object E (ERelatedToBList).
Loop over the D list.
For each itterD retrieve a list of E and add to ERelatedToBList
Expose the list ERelatedToBList to the Datagrid
If unclear or you need a visual, add it to the comment.
Go Make It