Yep, I think you're stuck reinstalling because although it is technically possible to change a site code, it would most likely cause havoc in a real live site that is actively managing clients. And of course, as Herik mentioned, totally unsupported.Jason | http://blog.configmgrftw.com

I agree with Jason. You are going to have to start over. You "could" migrate all those clients over to a new heirarchy. I've gone to using totally random site codes since it seems that everyone started using P01, CEN, PRD etc. My new 2012 site code is a totally random letter and two random numbers. John Marcum | http://myitforum.com/cs2/blogs/jmarcum/|

Hi, I'm in process to integrate some SCCM 2007 hierarchies in a unique hierarchy but some sites had the same site code. It's possible to change the site code? How I should proceed in this case?

It's not supported to change the site name or the site code after installation.

Yep, I think you're stuck reinstalling because although it is technically possible to change a site code, it would most likely cause havoc in a real live site that is actively managing clients. And of course, as Herik mentioned, totally unsupported.Jason | http://blog.configmgrftw.com