When you try to play Call of Duty: Black Ops 3 game returns to the main menu and displays the message “Can not connect to the server.”
This problem exists on pirated versions of the game, you can not even pass the company because of “can not connect to the server.”
Solved installing the patch.
Installation: Download and install in the game directory.
Download: Call of Duty Black Ops 3 PatchFix v.1.12