Once you have installed the ToutApp package into Salesforce, you will have access to Tout buttons including Push to Tout.
To install the Push to Tout button in Salesforce:
1. First, click on Setup within the dropdown menu under your name
2. Then click into: Customize -> Leads -> Search Layouts.
3. Click on Edit next to “Leads List View”
4. From here, choose Push to Tout -> Right arrow button -> Save
NOTE: You will need to complete these steps for each: Leads, Contacts, Accounts and Opportunities.