How to access a unified inbox for more than one zoho accounts (using paid workplace services)

How to access a unified inbox for more than one zoho accounts (using paid workplace services)

Hello, we are using zoho for a few months and also suggest your services, setting them up for our clients.

Several from our clients, our company as well, use more than 1 email addresses. Using the web version, we are only able to add them as accounts and access them by clicking on the bottom left of the screen. 

We request a solution on how it will be possible to see all the inboxes in one unified inbox, using the workplace via web https://workplace.zoho.eu/

Thank you for your attention, time, and response.