Hi @N D
According to my research, please check the below two points which may lead to your issue:
- Check if you disabled the Favorites section.
- Check if you switched to the Folder List Navigation.
In Mail, click View > Folder Pane > Favorites.
If you turn off Favorites, and then turn it back on, the same folders appear.
Tip: If the Favorites command is missing, you are probably in a special view known as the Folder List, not Mail. On the navigation bar, click Mail.
To switch between the Mail Navigation and the Folder List Navigation, you can use the Navigation Panel at the bottom left or use their keyboard shortcuts.
CTRL+1 Mail Navigation
CTRL+6 Folder List Navigation
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