Here is issue:
Sending Epic to VSTS does also automatically send the Feature from AHA to VSTS. However, the Epic and Feature in VSTS are not linked.
|Release time frame|
Thank you for your idea. This is currently possible. You will need to be sure that you have created the Links to mapping shown in the screenshot to maintain the relationship between the records when they are sent to VSTS. This article provides more details on these mappings as well.