I would like to upgrade from 10.3.1 to ZCM 11. I am currently using a SQL 2005 database and would like to upgrade to SQL 2008 at the same time. Is it possible to leave my current environment status quo (two primary) and add a new server as ZCM 11 or do I need to update my existing servers first? Do the clients need to be updated as soon as the servers are or can they be slowly migrated?