How to configure "shortnames" in IPA
Issue
IPA supports user & group resolution and user authentication in all domains to be possible by using only the short names without the domain component.
For example, admin instead of admin@linux.mylab.local or administrator instead of
administrator@windows.mylab.local
Environment
IPA (ipa-server-4.5.0-21.el7_4.2.2.x86_64) in a trust relationship with an AD forest
SSSD (sssd-1.15.2-50.el7_4.6.x86_64)
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