Hi,
Thank you for posting in Symantec community.
I would be glad to answer your question.
These articles should answer your query.
Steps to prepare computers to install Symantec Endpoint Protection 12.1 client
http://www.symantec.com/docs/TECH163112
How to prepare computers for remote deployment
http://www.symantec.com/docs/HOWTO16365
Preparing Windows operating systems for remote deployment
http://www.symantec.com/docs/HOWTO81300
Installing Symantec Endpoint Protection clients remotely
http://www.symantec.com/docs/HOWTO59432
Remote Installation Troubleshooting
ftp://ftp.symantec.com/public/english_us_canada/products/symantec_endpoint_protection/11.0/manuals/mr4/rem