I have a three level tree, each level has a partion and at least one
server in each partiton. I'm decommissioning the server in the second
level partion. Can I remove the second level partion without adverse
effect on the third level, or do I have to remove the third level
partion as well and then re-establish the partition at the thrid level?

So the OName has a partition with 4 server having a copy of the
partition (servers actually located in the OU=OUName container). Then
each of the second level OUs have a Partion with one server actually in
the OU (These are the servers that will be decommissioned, except those
in the OUName container). All of the third level OUs have one server
(each located in a remote office across a patial T-1 WAN copnnection).