Hello Mark D,
Thank you for sharing the details.
Configuration deployed to Custom Group/OU/Security Group will be available to the new machines joining to the domain. Hence, if you wish to automate standard software installation and other configuration settings then deploy Custom Group/OU/Security Group so that required software and settings will be applied to the machines as soon as it's joining to Domain.
Trust the above information helps. Let me know if you have a additional questions at the moment. I'll be glad to assist you.
Regards,
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Dinesh Babu J
Sr. Technical Consultant
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