You are transflaunted. 
Thanks for the edifying posts!
I think it’s driven more by the *perception * of client expections. At one job, we had extensive contact with the client (onsite consulting). My boss expected male employees to wear dress pants and ties because we were “high-priced consultants” and we had to “look the part.” By the end of our first month there, the client had told us in words of one syllable to lose the ties because we looked out of place and it rattled the client’s own employees.
How does this concern transgendered employees specifically? I think employers hear “transgendered”, especially “male-to-female transgendered,” and they think “drag queens.” For some reason, employers seem to think that a gentleman who wore a suit every day for years is going to turn into a walking parody of femaleness in lime-green platform shoes, a feather boa, and a skin-tight, cut-down-to-here crushed velvet sheath dress. Unless your workplace is unusual, this is not what clients expect to see.
…or expectation of customer expetations!
Whether in or out of the business arena, I think men are a lot more constrained by cultural norms as to dress. We have to dress far more modestly, for one thing, and that’s something I hate this time of year when it gets hot. We can’t wear shorts anymore, because men don’t wear shorts any more, or at least not anything you would have called “shorts” up to about 1990.
Times and fashion change, but it’s discouraging when they change in a restrictive direction.