I don't plan to go full time till next year, but i already contacted my companies HR department and let them know of my intentions, and they will not tell anyone else till i ask them too, i telecommute to work and have little contact with customers, mainly talk with out field techs on the phone, HR was fine with me transitioning and even asked if there was anything they could do to help. I suspect i may not be the first to do so.
I been on hrt just about a year and around the 6 - 7 month mark i was getting asked questions like "did you get your hair cut", "have you lost weight" , "did you get a new shirt" people were seeing something different about me but didn't know what, and this was from people that see me all the time, most noticeable were the facial changes, since then i guess people are used to the changes as they come or they have figured it out and are not saying anything.
Paula