Coexistence or migration: What is required?
If a coexistence or migration deployment is under consideration in your company or organization, then these deployments may not require as much planning as you might undertake for a new install. However, you should not underestimate the importance of understanding how new Sametime servers will coexist or what effort might be required to migrate:
Which servers can coexist with older versions?
Understanding migration sequence.
Dealing with older data—what will migrate and what won't.
Which servers can coexist with older versions?
There are some specific coexistence rules that you need to consider when attempting to integrate Sametime 8.5.2 components into an earlier Sametime infrastructure. Many of these refer to client behavior or versions as opposed to server elements.
Community Services
For Community services, the existing Domino-based Sametime servers of earlier supported versions will coexist with Sametime Community Server version 8.5.2. That means...