While i still technically present at work as male. I have just been letting myself be free. As such I don't think I've forgotten necessarily how to pass as male. Instead, I now don't have the same pressures on how to be male. Those pressures which controlled my behavior in a way that made me seem male.
I feel happy and free, and just act normal, feme as that may be. Without the voice in my head telling me "that's not how men act," "do this," "don't do that."
I even feel like a better human being for it, because I can listen to my heart, instead of my dysphoria. The freedom makes me happier, and I think my colleagues notice that change (if only subconsciously) and we work together much better now.
I could probably remember how to pass as male. As much as I despise my masculine side, I'd do it to protect the children for such an event. But sooner or later, my happy and unrestricted side will catch up. Then I'd be caught smiling, laughing or giggling. Then the gig would be up. Can't stay stoic forever - not anymore.