Using Classic Outlook on Windows for personal email, calendar, and contact management
Hi everyone,
I got the information from our Outlook team that the issue has been resolved several hours ago. In order for the change to take effect, please restart Outlook 2016, and you should go back to the original experience of seeing both a local copy of your OneDrive file in the Attachments menu, in addition to the cloud link, allowing you to select how you prefer sending your OneDrive file.
If you still have the problem after restarting , feel free to let us know by posting a new thread. I will be closing this thread for further posting in order for affected users to easily identify this message.
More information you can see here.
Best Regards,
Neo Zhu