To fulfill the requirement that all managers must be able to view the Employee vacation requests report in their Manager portal dashboards, the report must be made readily accessible in a manner that integrates seamlessly with the existing portal structure.

D. Add the report to a public category, and then add the out-of-the-box Reports landing page to the portal: This approach ensures broad accessibility by placing the report within a public category, making it available to all managers. Integrating the Reports landing page into the portal provides a centralized location for managers to access this and potentially other relevant reports directly from their dashboard, enhancing the usability and efficiency of the portal.

Creating a new landing page (A) specifically for the new report may not be necessary if the existing Reports landing page structure can accommodate the report, and it may introduce unnecessary complexity. Adding a report widget and publishing it to the default (B) or without specifying the target audience (C) might not ensure the report's visibility to all managers as required.