I have a local domain server, managed via a Windows Server 2003 R2 SE machine, and would like to be able to broadcast messages as an administrator to all client PCs which are connected to the domain, whereby the message will just pop-up on the users' screens, and either an OK button appearing or it automatically times out. e.g. 60 seconds, and closes by itself.
However, in doing so, no additional software should be installed on the client PCs to receive the broadcast, as the internal policy is to strictly prevent "chat-communication" between users using third-party software.
Any way of going ahead to implement this?