You will encountered some problem when try to configure end user recovery using DPM 2010 Administrator Console.
After Google around, manage to find the solution from Matthijs blog. His blog is teaching you to solve above issue by going to DPMADSchemaExtension.exe tool rather than DPM Console.
Note:- DO NOT RUN IN THE DPM SERVER !!!
If you run DPMADSchemaExtension.exe from the DPM server, you will end up the same error message as above.
1. Go to Domain Controller Server
2. Map to Z:\ of the EUR location
3. Execute DPMADSchemaExtension.exe from the mapping drive.
Thanks to Matthijs and read more on his blog about the process of running DPMADSchemaExtension.exe.