I am glad to see I am not the only one constantly confusing useradd and
adduser.
e.g., a veteran programmer working in a MS Windows environment all his/her life would never run into something like this
As far as I know you don't even have a single standard cmdlet to create a user in AD using PowerShell - you have to install the Quest tools for managing AD through PowerShell to get a sensible set of commands.
I do, however, frequently frown at the similarly-named "createuser" command which (as I'm sure you guessed from the name) adds a user to a PostgreSQL database cluster.