Hi, @Parag Morye
Thank you for posting in Microsoft Q&A forum.
May we know what's the command-line exactly did you run? And how did you edit your command-line following that link?
And the error message suggest you to re-run the script after specifying the NetBIOS domain name in the DomainName parameter, did you try to add the parameter and re-run?
Here is the explanation about -DomainName:
-DomainName Specify the NetBIOS domain name of the server with the help desk or self-service web portal role. Only necessary if the NetBIOS domain name doesn't match the DNS domain name. This configuration is also known as a disjointed domain namespace. For example, -DomainName fabrikham where the DNS domain name is contoso.com.
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