Hi @WTurner99,

You may be able to go one of two different ways with this...

1. Our university has a SSO system ran by our IT folks.  For special use cases like this, we can request what they call a "sponsored account" for someone, which will give a username and password that will work through SSO even for an external vendor.  This would be our preferred method whenever possible.
2. If you're a Canvas admin, you can enable Canvas authentication as well as your SSO authentication in your root account > Authentication area.  You'll be able to choose a "position" for the different providers, and you'll generally want to have Canvas authentication as the biggest number, meaning it will only get used by people who know the "secret" url (insutition.instructure.com/login/canvas).  If you go this route, you can create a username/password in Canvas to give to the vendor along with that special login URL.

I would say this is rather uncommon, but not quite unheard of depending on the integration.  I am assuming they want a user account just for testing when I say this though.  If they are requesting an admin account, that is a whole different ball game and would trigger a lot of additional discussions, agreements, and approval chains here.

Hope this helps!

-Chris