Why doesn't MS Outlook show emails from MS Exchange?

Question

Outlook

The situation is the following. Transferred mail from one mailbox to another by exporting / importing letters along with subfolders. As a result, now letters that arrive and fall into subfolders are not displayed in Outlook, but the counter of unread messages works. Moreover, if you go to the mailbox through OWA, then you can see these letters there, which Outlook did not display. Removed caching - does not help. I didn't install any filters.
Has anyone encountered a similar problem? How can I force Outlook to display emails?
Outlook:

Web app:

Thanks in advance!

Answer 1

Apparently, the import was from an imap account, while the folders still have a specific type, you need to fix the properties.
https://www.slipstick.com/developer/code-samples/c...