One of his Team can see the Menu and I tried copying the same Groups to his User Account, but it is still not visible. Correct company is also selected on his account. I’m not sure where to look at now and what supposed to be the problem.
Also check the Disallow access tab, I think you can have settings in both allow and disallow.
You didn’t mention in your post that I saw, but is the user rebooting epicor after each change to test? Security settings changes in epicor do not take effect until the next reboot.