The server components that you must upgrade include View Connection Server, replicated servers, and security servers. Depending on the optional components you use, you might also need to upgrade View Composer.
The Local Mode feature for Horizon Client has been removed, and therefore View Transfer Server instances are no longer required. In place of the Local Mode feature, VMware recommends using Mirage, which is included with VMware Horizon 6. For more information, see the View Release Notes, available at https://www.vmware.com/support/pubs/view_pubs.html.
During an upgrade, View does not support View Composer provisioning and maintenance operations. Operations such as provisioning and recomposing linked-clone desktops are not supported during the transitional period when any View servers are still running the earlier version. You can successfully perform these operations only when all instances of View Connection Server and View Composer have been upgraded.
For View patch releases, see Applying View Patches.