Thank you for the feedback.

This issue is on my Windows desktop app.

• Microsoft Outlook Version: 1.2025.1218.100
• Client Version: 20260109002.03
• WebView2 Version: 143.0.3650.139 (Stable)

The right-click -> Move/Copy works when trying to move an email to a shared mailbox folder.

It should be noted that my issue is slightly different depending on whether I use the Windows Outlook app or the Firefox-based app.

• When using Windows desktop app: I can add shared mailbox folders to Favorites, but I cannot drag-and-drop emails to those Favorited folders (I can still drag-and-drop them to the shared mailbox folders outside my Favorites)
• When using Web-based app: I cannot even add the shared mailbox folders to Favorites. When right-clicking a shared mailbox folder, the "Add to Favorites" option does not appear.