two devices used with one pro zoom plan?

Hi! Sorry, I'm new to this community (forgive me if it's been already asked but I couldn't find a thread).

The person I work for has a zoom workplace pro account. We hold meetings with about 100 people. I looked and it said her account could have two devices logged in with that one account. I would like to be able to use her account with her on the call as well (since my zoom workplace pro is holding another meeting without me at the same time).  It would be much easier that trying to log in with an old account of mine that I keep having to jump through hoops to log into from since I never use it but when I have a mtg conflict. Thanks for any assistance or links that could answer my question. 🙏