Which Salesforce Connect adapter is best for accessing data from legacy systems?

The OData 2.0 or 4.0 adapter is particularly well-suited for accessing data from legacy systems due to its standardized protocol that facilitates data retrieval and manipulation. Many legacy systems are designed to expose their data through OData endpoints, making this adapter a strong choice for seamless integration.

Using OData allows for the utilization of existing web services from legacy applications, enabling organizations to modernize their architecture without extensive data migration efforts. This adapter provides efficient querying and supports complex data types, which are often necessary when dealing with the intricate structures of legacy data systems.

In contrast, the other options may not align as directly with the needs of accessing and integrating with legacy data sources. The cross-org adapter is designed for Salesforce-to-Salesforce connectivity, which would not be applicable for legacy systems. A custom adapter could be considered, but it would require significant development work and may not offer the streamlined access that OData provides. The SF Connect adapter for Amazon Dynamo DB is specific to that database service and wouldn't be relevant for broad legacy data access.