I have been tasked with merging two zimbra servers 1) zimbra 7.2.1 on redhat 5.8 and 2) zimbra 7.2.1 on Redhat 4. I have read "King0770-Notes-Merge Two Independent Machines." My question is on what is the best order of doing things. The process I was planing on following was to upgrade both servers to redhat 6.

For server 1
a) copy opt/zimbra from redhat 5 to redhat 6 server
b) download zimbra 7.2.1 for redhat 6 and run ./install.sh

For Server 2
a) copy opt/zimbra from redhat 4 to redhat 5 server
b) download zimbra 7.2.1 for redhat and run ./install.sh

Then
a) copy opt/zimbra from redhat 5 to redhat 6 server
b) download zimbra 7.2.1 for redhat 6 and run ./install.sh

Now with both both machines at Zimbra 7.2.1 on Redhat 6


The major question is should I Merge the two independent machines at the zimbra 7.2.1 level for merge them once we have migrated both machines to Zimbra 8?

Thanks any help would be appreciated.