XING ProBusiness is discontinued by XING; as such, we do not have an integration for it.
However, if you would like to import contacts from a XING ProBusiness search, you can use the following process:
1. Install the Effixient Chrome Extension
2. Select the Campaign you would like to add contacts to in the extension's menu.
3. Open the profiles you would like to add, and click the "Add to Campaign" button.