First-Generation Managed Packaging Developer Guide

First-Generation Managed Packages
Why Switch to Second-Generation Managed Packaging?
Move to 2GP: Migrate Your Managed Packages with Ease
Register a Namespace for a First-Generation Managed Package
Create a First-Generation Managed Package Using a UI
Create a First-Generation Managed Package using Salesforce DX
Components Available in First-Generation Managed Packages
Behavior of Specific Metadata in First-Generation Managed Packages
Package and Test Your First-Generation Managed Package
Update Your First-Generation Managed Package
Publish Upgrades to First-Generation Managed Packages
Manage Licenses for Managed Packages
Get Started with the License Management App
Lead and License Records in the License Management App
Modify a License Record
Refresh Licenses for a Managed Package
Extending the License Management App
Package and Package Version Object Fields
License Object Fields
Adding Custom Automation to License Management App Objects
Move the License Management App to Another Salesforce Org
Troubleshoot the License Management App
Best Practices for the License Management App
Troubleshoot Subscriber Issues
Manage Features in First-Generation Managed Packages
AppExchange App Analytics for First-Generation Managed Packages
Developing and Distributing Unmanaged Packages
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Extending the License Management App

The License Management App (LMA) is a managed package that you can customize and extend. In addition to using the LMA to manage leads and licenses, many partners also integrate it into their existing business processes.

The LMA includes these custom objects:

You can add custom fields to the objects as long as you don’t mark your custom fields as required.