The Salesforce Username field is used to associate the user with a Salesforce.com or Veeva CRM user account for delegated authentication. However, the admin cannot find this field in the User Details page layout to update.
This field is only available if the selected security policy allows login via salesforce.com.
To make the Salesforce Username field display in the Page Layout requires the user has Domain Admin access. Do the following:
- Go to Admin --> Settings --> Security Policies --> [Security Policy]
- Click the Edit button.
- Select Allow login using Salesforce.com.
- Enter the Salesforce Organization Id.
- Click Save.
Vault Help Documentation: