How to do it...

After you have upgraded DPM 2012 R2 to the latest DPM release, you must upgrade all of the DPM agents that are attached to the DPM server before protection can continue. This is something you need to do manually:

1. Open the DPM console, select Management and, on the left-hand side of the console, click on Agents. In the display pane, you will see DPM agents reporting Update Available.
2. Right-click the agents that you want to update and choose Update from the drop-down list.