Scenario:
Standard Lead Source field is missing when user create a new Opportunity even when this displays checked under the Custom Form > Screen Fields > Main > Lead Source > Show = True. Still in the actual Opportunity page Lead Source is not displayed.
Recommendation:
1. Use Administrator role2. Navigate to Setup > Company > EnabledFeatures > CRM tab > BasicFeatures
– Place a check mark at “MarketingAutomation” checkbox
3. Read “TERMS OF SERVICE FOR NetSuite MASS E-MAIL MESSAGING SERVICES“4. Click “I Agree” button
5. Click Save button6. Create a New Opportunity
– Notice that “Lead Source” field is now displayed.