"How do I activate my server if I have installed an EVAL version?"

You must activate the product with the DISM command IF you have already installed an EVAL version of the server you have purchased.

Info: The domain controller must not be activated!

Convert the trial version to a full version:

Windows Server Standard:

Please start the CMD application and then enter the following command: DISM / online / Set-Edition: ServerStandard / ProductKey: XXXXX-XXXXXXX-XXXXXXX-XXXXXXXXXXXXXXXX / AcceptEula

Windows Server R2 Standard:

Please start the CMD application and then enter the following command: DISM / online / Set-Edition: ServerStandard / ProductKey: XXXXX-XXXXXXX-XXXXXXX-XXXXXXXXXXXXXXXXX / AcceptEula

Windows Server R2 DataCenter:

Please start the CMD application and then enter the following command: DISM / online / Set-Edition: ServerDatacenter / ProductKey: XXXXX-XXXXXXX-XXXXXXX-XXXXXXXXXXXXXX / AcceptEula

Windows Server DataCenter:

Please start the CMD application and then enter the following command: DISM / online / Set-Edition: ServerDatacenter / ProductKey: XXXXX-XXXXXXX-XXXXXXX-XXXXXXXXXXXXXX / AcceptEula

Example: