Inconsistent behavior of `MoveSpamItemTo` between Outlook classic and Outlook web, when current folder is a shared mailbox

[lmontand]

Provide required information needed to triage your issue

Your Environment

• Platform [PC desktop, Mac, iOS, Office on the web]: PC desktop and Office on the web
• Host [Excel, Word, PowerPoint, etc.]: Outlook classic and Outlook on the web
• Office version number: Version 2408 Build 16.0.17928.20066
• Operating System: Windows 11
• Browser (if using Office on the web): All

Expected behavior

The moveItemTo field of the event.completed method of an integrated spam add-in should have a the same behavior in Outlook classic and Outlook web. In particular, when using it on a shared mailbox, I would expect the email being moved to a folder of the same shared mailbox.

Current behavior

I report an email from the red "Inbox" folder of the shared mailbox.

• In Outlook classic, the email is moved to the blue "Phishing" folder. Instead, I would expect it to be moved to the green "Phishing" folder.
• In Outlook web, the email is moved to the green "Phishing" folder, which makes more sense.

I would expect all Outlook versions to behave the same way as Outlook web. It is a weird behavior to have the email moved across mailboxes.

Steps to reproduce

1. Create an integrated spam-reporting add-in
2. Add <SupportsSharedFolders>true</SupportsSharedFolders> to the manifest
3. Replace event.completed by the code snippet below (request to move email to a custom folder named "Phishing").

   event.completed({
   onErrorDeleteItem: true,
   moveItemTo: Office.MailboxEnums.MoveSpamItemTo.CustomFolder,
   folderName: 'Phishing',
   showPostProcessingDialog: {
       title: 'Some title',
       description: 'Some message'
   }
   });

4. Report an email in a shared mailbox and observe where it is moved to.

[Adrian-MSFT]

@lmontand Thanks for reporting this issue regarding MoveSpamItemTo behavior. It has been put on our backlog. We unfortunately have no timelines to share at this point

Internal tracking id: Office: 9305597