You can select with Social Network Services you wish to enable for your members under General Options & Settings.

1. Click Setup in the left-hand navigation panel.
2. Click General Options & Settings in the Association Options section.

   

3. In the General Settings, scroll to Active Social Network Services: The social networks that you have currently enabled will be displayed.
4. Click the edit social network services link to add or delete social networks.

   

5. To add a new social network, click the Add a New Type button.
6. Enter the Provider Name and the Provider Website (optional).
7. Click Continue.
8. Click Save on the General Options & Settings page.