Hi, if you are playing with Fedora 22 beta, your experience with FreeIPA may be rough. When installing freeipa-server-trust-ad make sure to also install samba-common-tools package.
Samba packaging was split to allow samba-common to be an architecture-independent package but samba package didn't get dependency to samba-common-tools subpackage which contains /usr/bin/net utility. This utility is used by FreeIPA when you run ipa-adtrust-install. I've submitted update which fixes this issue  but until it reaches stable updates of Fedora 22, simply install samba-common-tools in addition to freeipa-server-trust-ad. As with any pre-release software, it is recommended to always run up-to-date system as bugs get fixed almost every day before release.  https://admin.fedoraproject.org/updates/samba-4.2.1-5.fc22 -- / Alexander Bokovoy -- Manage your subscription for the Freeipa-users mailing list: https://www.redhat.com/mailman/listinfo/freeipa-users Go to http://freeipa.org for more info on the project