Purchase a Volume Licensing agreement through the Microsoft 365 Admin Center or a licensed reseller.
: The KMS host must be reachable over TCP port 1688 . 2. How KMS Activation Works Microsoft Office Ltsc Professional Plus 2021 Kms Activator
Activating Microsoft Office LTSC Professional Plus 2021 Key Management Service (KMS) Purchase a Volume Licensing agreement through the Microsoft
These retail versions do NOT require KMS and activate directly via Microsoft’s servers. Microsoft Office Ltsc Professional Plus 2021 Kms Activator
If automatic discovery fails, you can manually point a client to your KMS host using the