1. From the management settings for the object whose field history you want to track, go to the fields area.
2. Click Set History Tracking.Tip When you enable tracking for an object,customize your page layouts to include the object’s history related list.
3. For accounts, contacts, leads, and opportunities, select the Enable AccountHistory, Enable Contact History, Enable LeadHistory, or Enable Opportunity History checkbox.
4. Choose the fields you want tracked.You can select a combination of up to 20 standard and customfields per object. For accounts, this limit includes fields for both business accounts and person accounts..Certain changes, such as case escalations, are alwaystracked.You can’t track the following fields:Formula, roll-up summary, or auto-number fieldsCreated By and Last Modified ByExpected Revenue field on opportunitiesMaster Solution Title or the Master Solution Details fields on solutions; these fields display only for translated solutions in organizations with multilingual solutions enabled.
5. Formula, roll-up summary, or auto-number fields
6. Created By and Last Modified By
7. Expected Revenue field on opportunities
8. Master Solution Title or the Master Solution Details fields on solutions; these fields display only for translated solutions in organizations with multilingual solutions enabled.
9. Click Save.Salesforcetracks history from this date and time forward. Changes made prior to this date and timeare not included.