Join a Server to the SharePoint Farm

Solution: Use the Join-SharePointFarm cmdlet from the SPModule.

The previous cmdlet (New-SharePointFarm) created the database and configured the SharePoint farm. You cannot run this again on the other servers. Instead, you need to join the servers to the farm using the Join-SharePointFarm cmdlet:

Join-SharePointFarm -databaseserver <database server name>
-configurationdatabasename <config database>
-passphrase (ConvertTo-SecureString -asplaintext -force -string
"<farm pass phrase>")

The farm passphrase used with the Join-SharePointFarm cmdlet should be the same passphrase used when you are creating the new SharePoint farm.