On this page of the Hitman 3 game guide, you will learn how to sabotage the monitoring system in the Burj Al-Ghazali skyscraper in Dubai.
Surveillance cameras installed in the Burj Al-Ghazali can greatly hinder Agent 47's work - especially on the highest difficulty level. Turning the surveillance off also allows you to complete all optional map objectives in Dubai more easily.
The best opportunity to disable the monitoring system comes during the story mission titled How The Mighty Fall. After going down to the level where the server room is located, you must first get the computer access card - without it, you will activate the silent alarm and alert the guards. Watch out for one of the cameras and the guard.
Enter the server room and then exit into the hallway through the door on the right - the woman talking on the phone shouldn't pay attention to you if you act quickly. Subdue the man marked in the image above, take the card and hide the body in the closet.
Return to the server room and swipe the access card through the reader. Then approach the first cabinet to the right of the computer and pull one of the server racks - this will give you access to the computer.
Now you simply need to click the third tile (Disable Cameras), and a moment later the screens in the security room will stop working immediately.