In this case, they could simply connect to the SAME Google Drive from Gmail.
The notes of each other will be displayed in the history section.
Here is a detailed flow about how it works:
1. Set up a shared google drive account for team (e.g [email protected])
2. For each member, connect to that account.
3. Now, when user A write some notes in the email titled ‘hi’
4. User B, could see the note in the same email thread.
5. When user B put down the notes, user A could see it too.
6. If SGN history is not shown, please make sure that ‘Show Note History(No effect for Inbox)’ is checked in preference section.