This may hint at a corrupted sync state or folder index on the user's connected email client on this problematic desktop. Could you try removing the account from that client then adding it back? If that doesn't work you may want to try a repair on the client, then set up the account fresh under a new profile in the client for good measure.
Additionally, it's also possible the email client simply isn't subscribed to those folders and isn't receiving changes here. Can you check which folders are subscribed as well? In Outlook on Windows:
- Right click the account name in the left navigation pane and choose "IMAP Folders"
- Click Query in the modal.
- Review the folders in the All and Subscribed tabs.
Kyle Kerst
System/Network Administrator
SmarterTools Inc.
(877) 357-6278
www.smartertools.com