On the Trusted Root Certificate Authorities tab, click on Import... You probably only need the certificate chain filecertificates_pkcs7_v5_13_dod_der.p7b, but Cyber Exchange occasionally changes how the files are formatted, so I just attempt to import all certificates (one at a time) just ...
http://akoarmymil.com/department-of-defense-dod-enterprise-email-information-page/ AKO email addresses (xx@us.army.mil) though are still applicable. Email bound for AKO accounts would keep on being mechanically forwarded to DoD EE accounts (xx@mail.mil). Just the related AKO email storage, ...