Manage Record option is missing
Issue
After the SharePoint Online Connector is deployed to a site, you may find that the Manage Record option in the Ribbon, or in documents' context menus is missing or duplicated.
Versions Affected
All
Resolution
Remove and re-deploy the SharePoint Online Connector App on the site as follows:
Unregister the App from the SharePoint Online site contents
Delete the App from the site collection
Remove the deleted App from the primary and then the secondary recycle bins
Re-deploy the App as you would for a new site