KMS activation is not permanent; it lasts for 180 days. Your computer attempts to renew the activation silently in the background.
Ensure TCP Port 1688 is open on the KMS host to allow incoming requests from clients. KMS vs. MAK: Which is better? office kms server
You install Office using a Generic Volume License Key (GVLK) . These keys are public and tell Office to look for a KMS server. KMS activation is not permanent; it lasts for 180 days
KMS activation only begins once a certain number of unique computers have requested activation. For Office, this KMS threshold is 5 computers . KMS activation is not permanent
Client setup keys are published by Microsoft (e.g., for Office LTSC Professional Plus 2021).