In config manager on an application under the deployment type properties for MSI based installs there is the windows source management option. Tells the client that instead of the c:\windows\ccmcache folder that the content is on the distribution point in the case of a repair/upgrade. This feature prevents a lot of 1603 errors from the cache having cleared. It would be great if we can get an option to set this from the publishing service created apps instead of having to go in and manually add it after. The field just needs the MSI product code which you are already putting into the uninstall/repair fields on this same screen.