Question Method to use pattern unlock while encrypted

I'm curious - has anyone messed with this on their S5?

Without my phone fully encrypted - I'm limited to using TouchDown for my work e-mail. As far as I know - it's the only e-mail client that actually encrypts the mail database, etc. I hate TouchDown. I also cannot handle typing a password to get onto my phone each time... which is why I'm exploring this option. Even the PIN option is greyed out for me. Ugh.
Carrier: VZW
Phone: White GS5