Hi @Jason ,
Welcome to our forum!
As i know, in Calendar view, there will be three calendars for your accounts. For this, we can only open them in side-by-side view but not make the meetings of three calendars in one calendar.
As a workaround, it's suggested that you could create a rule (forward the meetings to Account A) for Account B and Account C. In this way, all meetings will be shown in the calendar of Account A.
Hope to help you!
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.