Modify Standard Auto-Number Fields in Salesforce Classic

The unique identifiers for solution, case, and contract records are standard auto-number fields. Each record is assigned a unique number with a specified format upon creation. You can modify the format and numbering for these auto-number fields in Salesforce Classic.

Required Editions

Available in: Salesforce Classic
Available in: Contact Manager, Group, Professional, Enterprise, Performance, Unlimited, and Developer Editions
User Permissions Needed
To modify standard auto-number fields: Customize Application
  1. From Setup, enter the name of the object whose field you want to modify in the Quick Find box, then select Fields.
  2. Click Edit next to the name of the auto-number field.
    For example, for cases, edit the Case Number field.
  3. Enter a Display Format to control such formatting details as the minimum number of leading zeros as well as any prefix or suffix for the number.
    For more information, see Custom Field Attributes.

    Format changes don’t affect existing records; they’re applied only to new records.

  4. Enter the number to be assigned to the next record that is created after you save your changes.
  5. Click Save.
Warning
Warning Salesforce warns you if the next number you enter isn’t higher than existing numbers. However, it‘s possible to create duplicate numbers if you change the auto-number format multiple times using similar formats each time.