Yoxel Sync licensed users can activate the Salesforce sync right from the add-in.

Simply navigate to the add-in's 'Sync' tab and click 'Activate'.

Your sync is usually pre-configured by a Salesforce admin and you don't have to configure anything.
Start syncing by clicking the 'Sync now' button.

To see all your sync configuration details login to your Salesforce account and navigate to the 'Yoxel Sync' tab.