How to manage zoho email account from a gmail account

How to manage zoho email account from a gmail account

Hi,

I used this guide:

https://fitsmallbusiness.com/topic/how-to-link-zoho-email-with-gmail/

to be able to send and receive emails from my zoho account, from a gmail address. However when I archive emails in my gmail account, they are not archived on the zoho server. Can anyone help with setting up full integration? 

Many thanks.