http://developers.de/blogs/rolf_nebhuth/archive/2009/05/14/signing-click-once-applications.aspxIf you play with Click Once deployment, you noticed that is really click twice because you will be asked if you trust the publisher. If you want to have the real Click Once Feeling you need to have to sign your application. Following Steps are requiredenCommunityServer 2008 SP1 (Build: 30619.63)