Elifroejd,   That is what the OMIMSSC appliance is used for, as  SNMP discovery for iDRAC9 is not supported and won't work. From what I see 7.3 is the latest version, which can be found here.    Let me know if this helps.    
When I am in the Dell EMC Feature Management Dashboard the Total Node Count is 0. But the server itself is discovered under Dell EMC Servers and Rack Workstations view. I installed the Dell EMC Windows Server Agent-Based and iDRAC7 or iDRAC8 SNMP Management Pack Version 7.3 for Microsoft System Center Operations Manager. But can't see if there is a later version with iDRAC9 support. Anyone who can help with this? The server is a PowerEdge R640 ThanksElias
DRAC monitoring in scom not working iDRAC9