Hi,
My question is when I push the client packages out to reflect the SBE version, will they install ok? Or will i have to go around to all the pcs and uninstall the SEP version and then push out the SBE version to the clients?
--> Enterprise Edition to Small Business Edition is downgrade so you can not deploy SBE package over the Enterprise Edtion clients.
You might be aware that SBE has limited features compare to Enterprise Edition
If not, check this article
Feature comparison between SEP 12.1 SBE and EE
https://www-secure.symantec.com/connect/articles/feature-comparison-between-sep-121-sbe-and-ee