I have heard all kinds of stories about telling employers about MS and I really don't know what the answer is. I am a private person, but I have found support by talking to fellow MSrs in the community.
I'm an old-school, embarrassing Joni Mitchell fan. Her music made a hook in my soul and hasn't let go for all these years. I even sing her songs as lullabies to my kids.
Managers in all too many American companies do not achieve the desired results because nobody makes them do it.