Your situation really bugged me. A cane should not prevent you from doing your job as a manager.

So I googled MS + ADA

and I think this might be a good resource for you

http://www.sedbtac.org/

I don't know what part of the country you live in, but there should be a way for you to find out where your local ADA offices are located as well as their URL address.

Hope this helps.