Once you have created a shared administrative image directory, you can notify clients by email.
Configure the administrative image directory to be shared on a machine that is accessible to other computers (for example, through a UNC path).
You can send an email containing a link to admin_image_install_dir\StartSWInstall.hta to all clients. Clients then can click this link and then click Install SolidWorks products now to start the installation from the administrative image.
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