I don't think it's enabled by default. There's a SIP-ALG proxy that you can add and configure:
http://www.watchguard.com/help/docs/fireware/11/en-US/Content/en-US/proxies/sip/sip_proxy_general_c.html

I don't at the moment. Combination of dying hardware which I haven't replaced yet, and new job which is taking up a lot of my time. That combined with some other life stuff has put it on the back burner. I'll get it set up again eventually, when I have something pressing that I really want to play with. I do miss having it a bit when answering questions. The type of things where I'm 99% sure that it works the way I think it does, but before I open my mouth in a post I just want to verify.

@thwr Oh I didn't really need a mango level any more than I need a spice level, it was more of a rhetorical joke

If you don't have it yet in your interface and want to try it, just go here: https://tasks.office.com/

@NetworkNerd Being an American, usually in Feet and Inches.

Thanks. I just heard about this place today from my other home online Spiceworks. Does this place have a mango level?

@scottalanmiller Thank you!

It's going to become a bigger problem as batteries become more energy dense. I don't think most people appreciate how much energy is stored in a modern battery. They just see oh it's 3000mAh. Drive a nail through one, and you will find out real quick. Leave one in your car on a hot summer day and you might be in for a bad time.