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[12/2/2008 PM]  The installation mode is set to: 'Install'.[12/2/2008 PM]  An Exchange organization with name 'CPSO First Organization' was found in this forest.- If there is an existing computer object, verify the Cluster Identity 'EXCHANGECCR$' has 'Full Control' permission to that computer object using the Active Directory Users and Computers tool.Here is the installation log from the Exchange setup: [12/2/2008 PM]  ************************** [12/2/2008 PM]  Operating System version: Microsoft Windows NT 6.0.6001 Service Pack 1. [12/2/2008 PM]  Logged on user: CPSOAPPS\administrator.[12/2/2008 PM]  Applying default role selection state [12/2/2008 PM]  Setup is determining what organization-level operations to perform.[12/2/2008 PM]  Because the value was specified, setup is setting the argument Organization Name to the value CPSO First Organization.[12/2/2008 PM]  Command Line Parameter Name='fromsetup', Value=''.[12/2/2008 PM]  Ex Setup UI was started with the following command: '-mode:install -sourcedir: D:" /From Setup'.
[12/2/2008 PM]  Schema Update Required Status : 'False'.
I set up a test lab from start to finish and had no problems while I simultaneously developed an installation procedure for our network.
Unfortunately when it gets to the part where it attempts to create the clustered mailbox at the end of the installation, I get the following message: Cluster Common Failure Exception: The group or resource is not in the correct state to perform the requested operation.
By default all computer objects are created in the 'Computers' container; consult the domain administrator if this location has been changed.
- The quota for computer objects has not been reached.
CPSOAPPS.local for initial queries [12/2/2008 PM]  Prepare AD has been run, and has replicated to this domain controller; so setup will use alphanew.