PGP for Office2016/17, Exchange 2016 & Server 2016
MIT Key Server:
(users public PGP database)
Please make all your Microsoft products easy to work with PGP.
external server to external server can use DKIM for PGP keys.
and allow your products to work with legit key servers like MIT. make your own key server, if you want to, but share/sync the info back to MIT server(like PGP-DNS).
allow sharing of key servers data, like mirror/sync
allow key servers to use DKIM keys to communicate to external servers.