Manually Importing the Microsoft Certificate Authority Root Certificate on McAfee ePO Server or Agent Handler
Login to the McAfee ePO server or Agent Handler. Launch the Microsoft Management Console (MMC) and add the Certificates snap-in. When prompted, select Computer Account. Then click Next to proceed.
In the Select Computer screen, choose Local computer. Then click Finish.
In the Microsoft Management Console, expand Certificates > Trusted Root Certificate Authorities. Then right-click on Certificates and select All Tasks > Import. Complete the Certificate Import Wizard, selecting the certificate that was exported in McAfee Deep Command Installation Guide - Step 2. When complete the certificate will appear with the other certificates.
More resources for installing McAfee Deep Command
Appendix C: McAfee Deep Command Setup Checklist