Data.com Account Data Assessment to Be Retired

Free account data assessments using the Company Info for Accounts data integration rule are scheduled for retirement in Salesforce as of Winter ’18. You will no longer have access to assessments that you’ve run before Winter ’18. If you have a Data.com Premium Clean license, you can still use the rule to update your accounts with company information. This change applies to both Lightning Experience and Salesforce Classic.
Available in: Professional, Enterprise, Performance, and Unlimited Editions

For details, see Data.com Account Data Assessment will be retired with Winter ’18 release.