Was there ever a defined resolution by McAfee for this? I never tried the "pinging" part of ePO 4.5, but thought I would try it out just now and I too get the "Failed to determine host IP address" error message. If I can ping the device by its hostname or IP address, why can't ePO do the same thing using its built-in application?
The ping function in ePO 4.5 will only try to ping the machine at the IP that is stored in the database - so if this is a new machine that has not communicated yet, then it won't have an IP in the database and you'll get the "failed to determine host IP address" message.
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