Outlook 2016 IMAP not synching Inbox
Outlook 2016 is only pulling emails from subfolders. Inbox is empty.
Check if the path to your Inbox is set in your Outlook 2016 settings.
To set the root folder path for your IMAP account:
File-> Account Settings-> Account Settings…
Double click on your IMAP account.
Button: More Options…
Option: Root folder path
Setting this to “Inbox”
Click OK to close all of the opened dialog boxes.