I have a problem that I do not get the OCM contacts in Outlook also they are set as shared, behaviour is the same for OCM contacts I created as well as the once others create.
To troubleshoot the issue, please clear the cache of your IE browser with the steps below and check if the issue can be fixed.
Please go to IE settings > General > Settings under Browsing history > Caches and databases.
Delete cache files for the website "outlookapps.com".
Then, restart Outlook 2016.