Hello Kimberly Berger,
Good day!
Thank you for posting to Microsoft Community. We are happy to help you.
Before we proceed, I would require more information to assist you accurately.
Based on your description are you facing the issue in all the browser (Edge browser, chrome, ...) if not try all the browser and in private mode to see if the issue persists
Have you tried clearing the browser cache?
Make sure in View>Layout>Folder pane>Show is check always
- What is the type of account? Is it a POP, IMAP, Exchange ActiveSync or Exchange account?
2. Are you using outlook.com account or Hotmail
The information above is very important to find the cause and provide the right trouble shooting
Please get back to us with necessary information, we’ll be glad to assist you further.
Appreciate your patience and understanding and thank you for your time and cooperation
Sincerely,
Eben | Microsoft Community Moderator