still cannot get this useless google drive app to function as advertised, and still cannot get a reply from support except "hmmm.. no one else is reporting problems" And yes, I've emailed you. Over, and over again. It creates a sheet when it's first 'connected', and there is never a 'message tab'.
The connections all work post-connection, so there's not going to be a messages tab until the messages start to come in. It's not an archiving feature that store old information that was previously on the account, it only saves the new information coming in post-connection.
This question has received the maximum number of answers.