If you are a Google Apps user then before linking your Email Id with SalesIQ, please configure the SRV Records (part of DNS records) for your domain to connect salesIQ with your domain.

Now, enter the Email ID in the XMPP/Google Chat textbox and click Update.

You will then receive 5-friend requests in your Gmail Id from bots, through which the SalesIQ chat will be routed to your Gmail chat.

Accept the requests in your Gmail chat, and converse with your SalesIQ customers through Gmail chat.