Inbox is a Qontak Omnichannel feature where customer service will serve all user complaints in the form of chat that goes into the Inbox.
To view open chat session hours, you need to follow these steps.
Open your Omnichannel Account.
Go to the Inbox page and you can see the profile display which is equipped with an image (Clock) that indicates the session in the message. There are 3 sessions to know.
(Blue = still within 0-16 hours), (Yellow = less than 16-24 hours), and (Red = more than 24 hours).