Sending email invites from the Mac client

I was experiencing the same issues as described here, namely the "Cannot Schedule Online Meeting
You cannot schedule this online meeting because there might be issues with your sign in account. Make sure you are signed in to the same you use for Microsoft Outlook. If the problem continues, contact your System Administrator." error message.

Once I logged in to Skype for Business and had it open while scheduling the meeting I was able to get the Skype meeting info added to the invite.

Odd that the SFB app has to be running, but... at least there is a way to make it work.