Planning Active Directory Protected Users membership and managing its exceptions

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Microsoft's Protected Users group applies fixed protections against credential theft, such as blocking credential caching, NTLM and Digest delegation, and limiting Kerberos to newer encryption. Because these restrictions cannot be toggled per account, adding a user is a compatibility decision as well as a security one. The article recommends first inventorying authentication dependencies through logs, then running a small pilot that tests interactive sign-in, administration, Kerberos tickets and delegation. Organizations should keep a tested break-glass account, record approvals and rollback steps, and review membership regularly so the group stays small and current. Protection only applies on supported hosts and domain controllers, so the platform should be verified before reporting an account as protected.

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