For better analysis, could you please share us with more details?
- What are dragged and dropped from Outlook to OneDrive? Files or something else?
- Are you referring to new emails on Outlook desktop client, and local OneDrive folder? Or others?
If so, please try to drag files from other folders to Outlook emails, this action will help us determine if this is an issue with Outlook.
Besides, it's recommended to refer to the similar thread 'Drag and drop file from windows explorer to outlook email not working'.
If the thread does not work, it's best post a new thread with 'Outlook' tag on Q&A forum ~
As the tag of 'OneDrive Management' focuses more on syncing issues of OneDrive. Thanks for your understanding.
- Do you have multiple monitors connected?
If yes, I suggest you move the Outlook application and OneDrive folder to your Primary Monitor to have a check.
Any updates, please feel free to post back.
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