Which solution would meet the requirement of capturing over 5,000 incoming emails as cases without requiring software installation?

On-Demand Email to Case is a suitable solution for capturing a high volume of incoming emails as cases without the need for any software installation. This feature allows organizations to create cases directly from incoming email messages without requiring any additional infrastructure or applications on the local servers.

With On-Demand Email to Case, Salesforce manages the email processing in the cloud. This approach also offers an easier and faster setup since it doesn’t involve setting up any middleware or installing applications on users’ machines. The service can automatically convert emails into cases with predefined routing and escalation processes according to business rules, efficiently handling large volumes of emails.

This solution is ideal for organizations that want to leverage Salesforce for case management while simplifying their IT operations, particularly if they anticipate capturing over 5,000 emails regularly.