I'm new with this mail system and with CentOS. In my new job we have Zimbra 7.01 over CentOS 5.6 and I want to move forward.

I have the new zcs-7.2.3_GA_2872.RHEL5_64.20130304144832 to upgrade my 7.0.1 but I dont know how to.

I need step by step instructions.

Thank you.