Hi Pittman,Thank you for posting. This is known issue. Our Outlook team is actively investigating this problem. In the meantime, you may please use the workaround mentioned in the article Unable to save changes to a draft email in Draft folder for IMAP accountsRegarding this we would truly appreciate your kind understanding.Best regards,Shyamal
The workaround didn't work for me.
This problem has been around for a long time, and the priority that Microsoft places on this work is probably not very high. I believe that all the people who are victims of this problem should encourage Microsoft to work more on this problem. One way to achieve this would be to make our voices heard on social media. If anyone knows anything about it, don't hesitate to take action! This gesture would be good for everyone. On the one hand, perhaps Microsoft could better assess how annoying this problem is. On the other hand, we might have a real solution more quickly.
Have a great day!