Without data to look at, we don't know the specific failures, as there are multiple causes for update failures. I would suggest opening a ticket with McAfee and get a mer from the agent handler and client trying to update from that handler for same time frame. (mer.mcafee.com). When you run it, be sure to run as administrator and choose the specific products, such as epo, mcafee agent and vse or ens, whichever is installed.
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