If you encounter errors when you configure a Salesforce connection, you might have to enter the Salesforce security token in the Salesforce connection properties.
If the security token is required and the Security Token field in the Salesforce connection is empty or not valid, the following error message appears when you test or create a connection:
The login to Salesforce.com failed with the following message - LOGIN_MUST_USE_SECURITY_TOKEN:
Go to the Salesforce web site to get the security token. To avoid adding the security token to the connection details, you can also add Data Integration IP addresses to the trusted IP ranges in your Salesforce account.