You can use UserSearch class to search for a specific user and if user is not found on server then you can assume that user is not registered on server.
I'd like to know if it's possible to check for the existence of a user by its username in the server. My application has to check if the people of the system contact list has an account opened in my server and they aren't in their friend list. So far I managed to add every contact in the system contact list to the server's contact list of my user -even if they haven't got an account beforehand-, but that's not what I'm looking for.
If it helps, I'm currently using Openfire as server.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.