Hi @Sandy Hays ,
What type of account are you using? Try switching back to classic view and see if you still have the problem with unread messages.
Please check email settings: In the new version of Outlook, click "Settings" > "Email" > "Message handling" and check whether the "Mark displayed items as read after 5 seconds" option is enabled. If enabled, uncheck it and select "Mark displayed items as read as soon as they're selected."
If the issue continues, you can try to mark items as read manually:
- Select a folder in the folder list.
- On the home tab, select Mark all as read.
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