Hi Everyone,We upgrade our SMS to SCCM and we also changed our sitecode.The problem we encountering right now is that existing clients is not reporting to SCCM server. Do I need to reinstall the agents to all the computers so it will report to SCCM server and their site will change?Pls advise what will be the best process that I can use.Thanks!

you need to upgrade your clients to SCCM with new sitecode

Reassignment is minimum, upgrading client will be necessary for new features.When you will run SCCM client install, it will uninstall SMS client and install SCCM one.If you just want to reassign see http://technet.microsoft.com/en-us/library/cc181435.aspxIf you want to upgrade client now http://technet.microsoft.com/en-us/library/bb632762.aspx

Thanks BLefevre!