My Colleague does not receive email from Zoom Scheduler

The app was working well for some time.  It is reviewing both of our schedules and recommending and appropriate time.  When we first booked meetings, it would show up on both of our Outlook calendars.   

It now reviews our calendars appropriately, sends her an email that the meeting is scheduled, but doesn't appear on her calendar.  When looking at the outlook email invitation, it lists just a random series of letters and numbers as being invited.

I added her to the CC part for Zoom Scheduler to solve this.     How do I get it to work properly instead of sending to a bad email?