I just noticed "Dell OpenManage Server Administrator Managed Node(windows - 64 bit), v8.5" was released today.
But if you use the download link, you unfortunately end up with the package for "Dell OpenManage DRAC Tools" (OM-DRAC-Dell-Web-WINX64-8.5.0-2372_A00.exe).
The same also goes for the OMSA 8.5 32 bit version.
Thank you for bringing up this issue. We have addressed this issue now. Kindly use the below URL's to download OMSA 32-bit and 64-bit packages respectively.
32-bit OMSA: http://www.dell.com/support/home/us/en/19/Drivers/DriversDetails?driverId=RJ12P
64-bit OMSA: http://www.dell.com/support/home/us/en/19/Drivers/DriversDetails?driverId=GYP4R