Dear @Catherine Jeong,
Good day! Thank you for posting your question in the Microsoft Q&A forum.
We apologize for any inconvenience you may encounter when using our services/ products. Based on your description:
The drag-and-drop functionality between New Outlook and New Teams desktop apps is currently not supported. While drag-and-drop works in Classic Outlook, the newer version lacks full integration for this feature.
Kindly try these following workaround steps:
- Switch to Classic Outlook
If you're using New Outlook, toggle back to Classic Outlook using the switch in the top-right corner. This version supports drag-and-drop into Teams.
- Save and Upload Manually
Open the email, click the ellipsis (...) > Save As, then drag the saved .eml file into Teams or SharePoint manually.
- Press ESC Multiple Times
A quirky but effective workaround: press the Escape key 3–4 times, then try dragging again. This can reset the drag-and-drop state in Windows.
- Avoid Admin Privileges Conflict
Ensure Outlook is not running with elevated privileges (i.e., as Administrator), which can block drag-and-drop between apps.
Drag-and-drop between Outlook accounts (e.g., from one mailbox to another) is being rolled out:
- Targeted Release: Mid-July 2025
- General Availability: Mid-September 2025
- This feature allows users to drag emails and files between accounts as attachments, provided the OWAMailboxPolicy setting ItemsToOtherAccountsEnabled is set to TRUE
Here is the reference: New Microsoft Outlook for Windows: Drag and drop files between accounts as attachments - M365 Admin
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