My experience is always different then today.
Did a lot of preliminary work done first (74-76), grow hair to shoulders, Electrolysis, HRT for a year. Told family of my intentions in 76.
Got my name change (court order) in NOV 76. Went to work (in DEC 76) to tell of that and of my need to work for the RLE. Had to get new work ID and Government security ID, had a Top Secret clearance and you don't hide stuff from them. Security already knew of my TS from when I was in military.
Met with local managers and HR people. NO eMail or stuff yet. Had to send many typewritten letters to doctors and HR to get permission to start working as female. Finally started to work as female in MAY 77, SRS in SEP 77. Then everything was Legal and Kosher than.
Did not keep any records of much from then, so can't relate how everyone from work reacted. I figure if it was bad, I would remember.