1. Ensure Outlook is the most up-to-date version.

2. Ensure the Outlook account is set up properly. Check the username, password, and account settings to prevent any possible login issues.
3. Check your outlook folder for the draft, and move it to the Drafts folder if it is located elsewhere.
4. Check if draft items are synchronized with the current Outlook version. If synchronization is not set up, configure the settings to enable synchronization.
5. Test if the problem is related to add-ins. Disable the Outlook add-in causing the issue.
6. If the issue persists, other software conflicts may be the cause. Check your anti-virus programs and other related applications for possible conflicts.