Web Based Remote Desktop I’m Looking For A Solution To Provide Support In My Company Internal LAN Users And Corporat WAN Users.?

I'm looking for a solution to provide support in my company internal LAN users and corporat WAN users.? - web based remote desktop

I am looking for a solution for my office internal support for my company internal LAN and the offices are connected via WAN.
The solution should be on the Web and Technical Officer should be centralized permission from users before it is to get IMPLIED remote to the complaint or issues. Some software such as VNC, pcAnywhere, Remote Desktop is not required because these tools for all users get in touch, without his permission, which is against my company policy.
Other characteristics of solid reporting, chat option with the user administrator, user