Check Unsaved Files:
If you were using the Outlook desktop client, there’s a chance that the unsaved draft might be stored in temporary files. You can check the following locations:
C:\Users\[Your Profile]\AppData\Local\Microsoft\Office\UnsavedFiles
C:\Users\[Your Profile]\AppData\Local\Microsoft\Outlook\
C:\Users\[Your Profile]\AppData\Local\Microsoft\Windows\Temporary Internet Files\
C:\Users\[Your Profile]\AppData\Roaming\Microsoft\Outlook\
Recover Deleted Items:
In Outlook, go to the Deleted Items folder.
At the top of the message list, select “Recover deleted items from this folder”.
If the draft is there, you can restore it.
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