Hi [NAME],   There isn't any documented information for End of Life and End of Support Life on PowerEdge servers. Usually they have about 5-7 years of support life, depending on the availability of hardware. Alternatively you can check each of the server's support capability in the support site: [URL] Enter the service tag of the server, go to the service event tab, uncheck the toggle button on "Only show active events" and you will be able to view the End of Service Life date. That is the only available information available for view. 
Dear Team, Can you please provide the Below server's End of Life and End of Support Life? PowerEdge R420PowerEdge R430PowerEdge R440PowerEdge R720PowerEdge R720xdPowerEdge R730PowerEdge R740  Thank you.
PowerEdge server's End of Life and End of Support Life