Hi Bhushan Borole,
Good day! Welcome to Q&A forum.
To identify license key installed on SharePoint 2019 server, using the following method:
Using SharePoint Management Shell (PowerShell)
Open SharePoint 2019 Management Shell as Administrator
Run the following command:(Get-SPFarm).Products
This will display the product ID (license key) for your SharePoint installation.
Using Central Administration:
- Go to SharePoint Central Administration
- Navigate to "Upgrade and Migration" > "Convert farm license type"
- The current license type will be displayed
Reference:
Steps To Upgrade SharePoint 2019 License Key
Hope these information helps.
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