I've created a Personal Desktop collection in Server 2012 R2 and selected "Automatically Manage Virtual Desktops" so machines are created automatically using a template. I've successfully added several Virtual Desktops to the collection, now I need to update the template to included new patches or software. I'm not worried about updating the existing virtual desktops because they will get the patches and software from SCCM. However, I do want the changes to be part of the template so they are immediately there for new virtual desktops that are added. I haven't found a way to do this is the Server Manager or Powershell, there is an option for recreating pooled desktops, but no way that I see to use a different or newer template on an existing Personal Desktop collection.
Do I need to manually export the template machine to the Collections IMGS folder and overwrite what is there? Also, it doesn't make sense to delete/recreate or make a new collection for a template update.