Terminal server Install mode
If you install any application or library on terminal server – it is necessary to switch server to install mode, else your application or library could work only for one user, who installed it. In my case it was a setup executable with ActiveX controls and libraries for Access application. First I forgot about Install mode, and other user had strange errors running acitvex controls, even saying “you do not have license to run this control”. This blog post explains why it is important.