Will moving to a CAS array object in Exchange 2010 mess up currently configured clients pre-CAS array config?

view story

http://serverfault.com – I'm planning for an Exchange 2010 environment that is looking to move from operating on a singular CAS server to having multiple CAS servers with a CAS array object configured. There are clients with Outlook profiles that are referencing the current CAS server and not the CAS array object. Will creating the CAS array object and then configuring the Mailboxes RPC CAS to point to the Array object be enough to update user Outlook profiles and cause minimal disruption to the organization or am I missing anything else that would need to be configured? I've already configured a hardware load bala (HowTos)