NetworkManager Icon not showing in ubuntu 16.10

Check status of NetworkManager service

$ sudo systemctl status NetworkManager
● NetworkManager.service - Network Manager
   Loaded: loaded (/lib/systemd/system/NetworkManager.service; disabled; vendor preset: disabled)
   Active: inactive (dead) since Wed 2017-03-08 12:39:02 IST; 27s ago

Currently NetworkManager service is showing disable permanently or stop .

Now start service and permanently on at boot time.
$ sudo systemctl start NetworkManager
$ sudo systemctl enable NetworkManager