Same password, many sites, different username iterations

I'll pile on to this request as well.  We have AD logins, and there are about 4 different username scenarios.  1) firstname.lastname 2) ADdomain.local\firstname.lastname 3) mailto:firstname.lastname@ADdomain.local 4) mailto:firstname.lastname@outsidedomain.com each for a different piece of equipment that takes a different syntax but all using the same AD password.  It would be awesome to be able to have a unified password for these situations so that when we change passwords I don't have to keep an outside list of every device using that password.