Trying to Bcc (blind carbon copy) someone in a meeting request in Outlook can be frustrating because there’s no explicit way to do it. However, you can do so by adding that person as a Resource in the meeting request.
Whoever you add as a Resource receives the meeting request and can accept or reject it, but other people you invite to the meeting don’t see that person on the list of attendees.
In the new meeting request, in the Show group, choose Scheduling Assistant > Add Attendees.
In the Resources box, type the name or email address of each person you want to Bcc.
Tip: If you’ve already added the recipients you want to Bcc as attendees, choose the icon to the left of their name, and then click Resource (Room or Equipment).
Finish filling out the meeting request as you normally would, and choose Send.