Tarekfaraj,  The supported iDrac cards for each of the servers are not compatible with each other. So the card won't function in the other server. The R520 would need part # 2827M. Hope this helps clarify things for you.
Hi, I am planning to move idrac 6 from r710 to r520 server. Is there any license issue with doing that ? What should I consider when moving the card ? r710 has idrac6 license and  r520 has idrac card express (unlicensed) Regards, Tarek
Move iDRAC Access Controller 6 -Enterprise from PowerEdge R710 to PowerEdge R520