They say “The victim account had been un-enrolled from Duo due to a long period of inactivity but was not disabled in the Active Directory” and one of the recommendations is " Enforce MFA for all users, without exception. Before implementing, organizations should review configuration policies to protect against “fail open” and re-enrollment scenarios."
What are the policies for re-enrollment? How do I prevent inactive devices from being un-enrolled? Are there other settings needed?