Act as part of the operating system
Verified with Windows Security Options 25H2 — updated on July 25, 2026
Security policy
This is a Security Options policy (Windows Settings > Security Settings), applied by the security engine — not an Administrative Template (ADMX). In GPMC/gpedit it is configured under Local Policies > Security Options.
Path in the GPO console
Computer Configuration\Windows Settings\Security Settings\Local Policies\User Rights Assignment Description
This user right allows a process to impersonate any user without authentication. The process can therefore gain access to the same local resources as that user. Processes that require this privilege should use the LocalSystem account, which already includes this privilege, rather than using a separate user account with this privilege specially assigned. If your organization only uses servers that are members of the Windows Server 2003 family, you do not need to assign this privilege to your users. However, if your organization uses servers running Windows 2000 or Windows NT 4.0, you might need to assign this privilege to use applications that exchange passwords in plaintext. Caution Assigning this user right can be a security risk. Only assign this user right to trusted users. Default: None.
Local security policy
SeTcbPrivilege This setting has no registry key. It is stored in the local security database (LSA) and is configured through the Group Policy console or secpol.msc.