Install Symantec Cloud AV over SEP v11.x

I have a Windows SBS 2008 server with a mix of XP and W7 clients running SEP v11.x

I wish to replace these clients with the Symantec Cloud product.

The documentation for the Symantec Cloud version of AV is confusing.  In one place it states that the installation will uninstall SEP and in another place it states that all Symantec Products must be removed before installation of the Cloud product. 

Where can I find definitive documentation?

Thanks in advance.

Al