How to insert all activity of changes in module change?

Hi Everyone,

 

I have requirement to tracking all assignment & assignee changes in module changes. When user perform reassingment to another assignment group or assignee, activty doesn't automatically filled.

This is very different with incident module, on Incident modules when user doing / perform reassignment group/assignee, the activity is automatically updated / filled. 

Would you please help me, which parts that i should configure to meet the requirement?

 

Best Regards,

Ucux