While I was searching information for a customer about IRM and AIP, I came across with the following post on MS Support: https://support.office.com/en-us/article/enable-users-to-sync-irm-protected-files-with-the-onedrive-sync-client-preview-6778d4de-b5f8-423c-af43-a1b2449e9b99?ui=en-US&rs=en-US&ad=US
It explains a new feature that it’s in Preview, which allows sync libraries with ODFB, but this libraries are protected with IRM. I found it great, so I decided to share it 🙂