Explanation
The consultant should map Salesforce custom objects to EDA objects to prepare for installing EDA into an existing Salesforce org. This means identifying which custom objects in the existing org have similar or equivalent functionality as EDA objects, and mapping their fields and relationships accordingly. This will help the consultant determine which custom objects can be replaced by EDA objects, which custom objects need to be integrated with EDA objects, and which custom objects need to be retained as they are. Choosing a middleware tool to integrate EDA, building applicable API customizations, and exporting all existing Salesforce data are not tasks that the consultant should do to prepare for installing EDA. References:
https://powerofus.force.com/s/article/EDA-Migrate
https://www.salesforce.org/wp-content/uploads/2019/03/Education_Cloud_Migration_Guide.pdf