For those who installed the Update Rollup 4 for System Center 2012 R2 Virtual Machine Manager, you may be facing this somewhat “strange issue” right after the installation – your hosts will have the “Needs Attention” status.
And now the “strange” part – if you open the host Properties window, and check the Status tab, you’ll may see that everything is green.
So, what needs the attention then?
The answer is – VMM agent needs the attention, and that’s the cause of this “issue” (you’ll need to run Update Agent action on affected hosts).
And, finally, status of your hosts should be OK again.
Hope this helps!
P.S. Read the KB document thoroughly – there is a part which mentions the manual update of System Center Virtual Machine Manager DHCP Server (x64) component. It should be like this: