Hello. Unfortunately, we are not able to open the link that you have provided. You view information about your memory on the iDRAC web interface under Hardware then Memory. You see error correction type (ECC or Non-ECC) within the memory information page. You can also view the same information on OpenManage Server Administrator and even make use of memory part number to ascertain more information.
*** all! I have some Dell PowerEdge R420 servers and i want to upgrade memory, install more.. How to verify the installed memory type (ECC or no)? Output dmidecode here: drive.google.com/.../view 
How to verify the installed memory type (ECC or no)?