Data Migration from Salesforce to Zoho - Issue with Activities

Data Migration from Salesforce to Zoho - Issue with Activities

Hi,

I'm testing out to see if we want to change our CRM. I attempted to do a data migration of the tasks/activities from our salesforce CSV files.. however ran into an issue there. They import, but weren't connecting to accounts. I have the account ID in there but can't put it in classified as a "lookup" in the customized field. Is there another way to do it so it connects them to the accounts? 

Thanks!