Debian Jessie (Minibian) cannot connect to WiFi?

I have two brand new Raspberry Pi 3s both running Minibian. I am trying to use the built-in WiFi adapater to connect to my server subnet. I can see the network I'm attempting to connect to with iwlist scan. The network I am attempting to connect to is WPA2 personal. It is setup to only use AES and not TKIP. This is what the /etc/network/interfaces file looks like... auto wlan0 iface wlan0 inet dhcp wpa-ssid Allen_Hundley wpa_psk MY_HASHED_PSK wpa-pairwise CCMP wpa-group CCMP wpa-proto RSN wpa-key-mgmt WPA-PSK One issue I'm thinking may be there is the underscore in my SSID. But I have been unable to find any information on this. What could the issue be?