You can notify clients by email when the administrative image has been created by the Installation Manager.
To notify clients by email:
Send <install_dir>\StartSWInstall.hta to all clients.
Clients open the file and click Install SolidWorks now.
If you are upgrading an administrative image
to a new SolidWorks version, you can configure your administrative image
location and share properties so that any clients that installed previously
using that image will upgrade automatically. For details, see Upgrading Clients from
Administrative Images.