cannot link my email to Zoho CRM

cannot link my email to Zoho CRM

We are reviewing Zoho as we heard it was an easy solution platform, but we have been trying for many days to get anyone at Zoho to schedule call to talk with us. 

We unsuccessfully have tried multiple times to link email to Zoho.  We put in request for this same issue with no resolve; only a single sentence reply, which does not help us.  An error message had told us to go to https://aka.ms/smtp_auth_disabled, but I do not understand these instructions.  
 
PLEASE help.