We have two unity clusters ver 5.0 pointing to same exchange server 2003 as message store. All the users are using this message store and most of them are on Unity cluster 1 and rest on Unity Cluster 2. Now I have installed a new exchange server 2003 and I would like to move some subscribers from existing exchange message store to the new message store.
I understand that I have to run the message store wizard to point Unity cluster 2 to the new exchange server but I would like to know the steps which I should be following and what downtime I can expect?
Thanks in advance