The fastest way to make your whole company happy
Most employees have separate passwords for every account, from apps they use to their email, to their computer login. For the employee it's a pain because they can never remember all of them, so they're constantly wasting their time clicking that 'forgot password' reset link. It's super frustrating because it constantly wastes five minutes of your time and get you out of your work groove.
If you're the IT guy, it's a huge issue because your employees are annoying you with password reset requests, when you have way better things to be doing. On top of that, your employees are constantly creating new free accounts, so you have no idea and no control over which apps your users are using.
A single identity with single sign on makes everyone happy. Now you've got one password for everything, self-service password reset, AND your IT team can control exactly which apps are allowed to be used, giving them the view and control they need to keep their company secure.