This is the most straightforward method for servers with a desktop experience installed. Open Settings : Click the button and select the gear icon for Navigate to Activation and then select the Activation tab from the left-hand menu. Enter Product Key : Click on Change product key and enter your 25-character license key. Complete Activation
Q: How long is the grace period after installation?
A: 180 days for Evaluation editions; 30 days for retail/volume (but some are 10 days). After that, the server will shut down every hour.
Q: How to convert Evaluation to Full edition without reinstalling?
A: Use DISM as shown in troubleshooting section. Then activate with a Standard or Datacenter key.
Each edition requires a unique product key. Activation methods differ slightly between retail (personal purchase), volume licensing (business/organization), and evaluation (trial) versions.
kms.server.name with your organization's server address):
slmgr /skms kms.server.name
slmgr /ato
slmgr.vbs /ipk <product-key>
slmgr.vbs /ato
slmgr.vbs /dli
slmgr.vbs /dlv
slmgr.vbs /skms <host>[:port]
slmgr.vbs /ckms
slmgr.vbs /upk
slmgr.vbs /rearm
Q: My server was activated, but after hardware change it says not activated.
A: For retail keys, run the Activation Troubleshooter in Settings. For MAK, re-enter the key. For KMS/ADBA, run slmgr /ato again.
Check your current edition:DISM /online /Get-CurrentEdition.
Phone Activation: If the server lacks internet access, run slui 4 in the Run dialog. This generates an Installation ID which you provide to the Microsoft automated phone system to receive a Confirmation ID. Troubleshooting Common Issues