Some delivered mail items were moved into deleted Item folder automatically.

Question

One user at company said that found some mails which was delivered in deleted item folder.
It's not ofter case, it seems that a few of mails within couple of month.
Message tracking log shows that delivered into the mailbox correctly.

Are there something to find the cause of root?
Is it coming from Outlook clients issue?

Thanks,

Answer 1

Hi @Wonderwhy

Yes, you could check if the user configured any outlook rules which may automatically move the message to the deleted items folder:

Get-InboxRule -Mailbox "user mailbox"  

Try to delete corrupted hidden Exchange inbox rules using MFCMAPI and check if this issue continues: How to delete corrupted hidden Exchange inbox rules using MFCMAPI
Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

Or another possible cause, if you select Ignore on an e-mail message, and then another message from that same thread is delivered into your mailbox.

1. Select the Deleted Items folder.
2. Select the message that is currently set to be ignored by Outlook.
3. On the Home tab on the ribbon, click Ignore in the Delete section.
4. If you are prompted, click Stop Ignoring Conversation.

Details about the information above:

1. Managing users’ Outlook rules from Exchange Management Shell (with PowerShell)
2. Messages in an e-mail thread are automatically moved to the Deleted Items folder

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Answer 2

I would check Outlook rules.