Which activation processes requires one of the following thresholds to be met?

$25$ or more client systems $($physical or virtual$)$ must require activation.

$5$ or more servers $($physical or virtual$)$ must require activation.

answer

Key Management Services $($KMS$)$

Licensing Management utility $($slmgr$.$vbs$)$

Active Directory$-$based activation $($ADBA$)$

Multiple Activation Key $($MAK$)$