What is Control Panel?
The control panel will allow you to do the following on Hosted Exchange:

- Create & Delete Mailboxes
- Add alias email addresses
- Setup forwarding of current mailboxes
- Set calendar permissions
The Hosted Exchange guide can be found here
The control panel will also allow you to do the following on Hosted Server:

- Create new servers
- Delete servers
- Manage servers (Shut down, Power up, Restart)
- Set addons to your server (such as extra disk space or CPU cores)
The Hosted Server guide can be found here
The Control Panel will also allow you to do the following on Hosted Sharepoint:

- Create new Sharepoint sites
- Delete Sharepoint sites
- Manage Sharepoint users
- Manage Sharepoint groups and permissions
The Hosted Sharepoint guide can be found here