To determine why emails are being marked as read automatically when they are moved to a different folder in Outlook, try the following steps:

1. Review Your Settings
   Check the settings to ensure that mails are not being marked as read automatically.


2. Check Mail Rule Settings
   Sometimes, Outlook mail rules can cause emails to be marked as read. Double-check any rules you have in place to make sure they are not causing the problem.


3. Check Add-Ins
   If you have installed any Outlook add-ins, make sure that they are not causing the issue. Disable any and all add-ins one-by-one to see if the issue is resolved.


4. Check Repair Options
   If all else fails, you may need to repair or reset the Outlook installation.