Outlook Threaded Conversations

I am using Outlook (windows) and Asana and I have all notifications set to “on”, so I’m getting an email for every activity.

Currently my Outlook is setup to organize the conversation by subject link, i.e. a “threaded” conversation.

This works with every other email correspondence except Asana.

Said another way, every email that I get from Asana is a “stand alone” email, even though the subject link is exactly the same as other messages.

This seems to be something with Asana and Outlook only.

Has anyone experienced this? Need a solution I can get to inbox zero without clicking on every message!

*subject line