KMS

Microsoft has mandated the inclusion of the Trusted Platform Module (TPM) as a standard feature in all new motherboards and CPUs to enhance the Windows activation process. The company has introduced an enhancement to its Key Management Service (KMS) that leverages TPM's security capabilities to authenticate the legitimacy of KMS servers. This new "TPM-based attestation" aims to mitigate exploitation risks associated with KMS by validating the cryptographic integrity of KMS servers. Starting in August 2026, TPM-based attestation will be required for KMS activation with the next release of Windows Server. Microsoft has also closed off the "KMS38" activation method in 2025, while traditional KMS activation remains functional. The Massgrave collective has developed an Online KMS method that may be impacted by the new TPM-based attestation.