Do you need PDF Generator for your solution ? If you dont, then you should not configure it at all. If you do need it, you need to specify user accounts to allow file conversions by the LiveCycle server. You can configure upto 3 windows ( domain or local ) accounts to facilitate high volume of PDF conversions. Essentially, for each thread, the LiveCycle server will open up Acrobat via a Corba call and will convert a required file to a PDF. In order for this to happen, you will need to configure the server and accounts correctly. The details on how to configure the user accounts can be found here
Also, you can find the PDF Generator configuration settings here
Please let me know if you have any other questions.
Thanks,
Armaghan