How to disable screen capture

Hello guys, I just installed spark and I can’t find any way to disable de capture screen option.

I want some of the users to not be able to capture the screen and to send it to another user.

Is there any way to do this?

I checked the plugins and spark options but I can’t find anything about it.

Thank you in advance!

Hi
You must install Client Control for your Openfire server and turn off File Transfer

Thank you for your answer @ilyaHlevnoy,

Thing is, I don’t want to stop the file transfer, I only want to stop the screen capture. The users should not be allowed to capture screen, and yet, be allowed to send files to other people.

unfortunately only this cannot be disabled