If you started with the 180-day trial and eventually bought a key, you don't need to reinstall. You can convert the Evaluation to the Standard or Datacenter version using the DISM tool:
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Using a pirated or counterfeit activation key can pose significant risks to your organization, including: If you started with the 180-day trial and
Using unauthorized keys in a business environment can result in severe financial penalties during a software audit. Legitimate Ways to Use Windows Server 2019 for Free Using a pirated or counterfeit activation key can
: Run DISM /online /Get-TargetEditions to see if you can move to Standard or Datacenter.