How to enable bulk Dux-Soup actions in Salesforce Contacts list
You can enable bulk Dux-Soup actions in the Salesforce Contacts list if you have Salesforce Enterprise Edition. To do that, click on the Setup Menu gear icon and select 'Edit Object':
Note that you need to install the Dux-Soup package/Connector NX before you can enable bulk actions.

Scroll down the menu and select the 'List View Button Layout' option:

Select 'Edit':

Then, select all available custom buttons, click the Add button, and then click the Save button.

You can now close the Editor page and go back to your Contact list. Dux-Soup available actions are located at the top-right corner:

You can access Salesforce CRM integration if you have Dux-Soup Turbo or Cloud.