Hello ITGuyNA,
Good day! Thanks for posting in the Microsoft Community. We are happy to assist you.
I understand when you create an appointment that ends at midnight it shows as an all-day event and shows on top of earlier appointments in the calendar. I have tested on my side and I could reproduce the issue.
After thorough research and consultations, it has been concluded that the feature you are inquiring about is not yet available. However, thank you so much for bringing this to our attention, your suggestion is beneficial, and I believe it could make the use of Outlook even better. We will surely raise your concerns with our Product Development Team and hopefully, this can be included in future updates.
In the meantime, I have taken the liberty to check for you in the Feedback Portal and this issue has been raised by other users Month View - Calendar Item from 11:30 pm to Midnight will appear on the top above other appointments · Community (microsoft.com), I have asked my team to vote, and you can share your vote and comments there as well. Our Product Development Team is committed to enhancing the customer experience by continually examining suggestions to include in the design and development of future product upgrades based on your suggestions. Hopefully, your suggestion will help many users in the future.
Thank you for your time and understanding. For other questions, feel free to add your post to the Microsoft Community.
Stay safe and healthy.
Sincerely,
Eleni | Microsoft Community Moderator