Which two solutions should be recommended to validate addresses entered into Salesforce in real-time?

The selection of creating a custom Address object for address tracking is not ideal for the real-time validation of addresses entered into Salesforce. While developing a custom object could facilitate the storage and management of addresses, it does not address the immediate need for validating addresses as they are entered. The correct approach for real-time validation should involve methods that can provide instant feedback to users, which is crucial in scenarios where user experience and data accuracy are paramount.

Utilizing an AppExchange application for address verification offers a robust solution, as many of these applications are specifically designed to integrate seamlessly with Salesforce and provide real-time validation capabilities. They can connect to external services that specialize in address data, ensuring that the addresses entered by users are accurate and conform to postal standards immediately upon entry.

Furthermore, implementing a VisualForce page or developing a trigger with a future callout also do not adequately meet the requirements for real-time validation. A VisualForce page would involve a UI component that may not provide instant feedback, while a trigger that includes a future callout introduces latency, making it unsuitable for scenarios demanding immediate interaction.

In conclusion, for accurately and effectively validating addresses entered into Salesforce in real-time, utilizing an AppExchange application is the preferred solution due to its specialized capabilities and direct integration features.