To authorize Yoxel to sync to and from your Salesforce account, navigate to the Yoxel tab and under Services expand section that corresponds to the Salesforce service. Salesforce account is automatically prepopulated for each user based on the account from which a user is accessing Yoxel app. 

Once you open the Salesforce service section select the categories of data you would like to sync and click “Authorize” button. You will then be redirected to a Salesforce authorization page. On this page (1) make sure that Yoxel is asking permissions to access your account and (2) click “Allow” button.