Is it possible as the admin or owner of the account to see when a team member opened or read a conversation? I have tried via GMAIL (admin tools log search) and google vault with no luck. Thanks in advance .
At this time is only possible to check when edits were made to a task. Is not possible to verify when it was accessed or read.
The edit history is available in the Activity Feed.
I went ahead and moved your post to the #productfeedback category, so you and other users can vote for this feature request!