I stumbled upon a strange issue where a Exchange Shared mailbox continued moving emails from Inbox to Recoverable Items folder

we have shared mailbox with full access for many people and someone deleted all items in this shared.

I run the command

Search-MailboxAuditLog -identity BelovedCustomersMailbox -LogonTypes Delegate,Owner -ShowDetails

That gives me no result related to the Soft Delete. No error.

It's Exchange Server 2013. On shared mailbox Audit logging has been enabled.

I checked everywhere including:

  • mailbox settings in Exchange Server admin portal
  • Exchange transport rules
  • Exchange Shared Mailbox Inbox Rules - --- Get-InboxRule -IncludeHidden
  • No any retention policy
  • get-calendarprocessing ---->>> automateprocessing : AutoUpdate

Still with no evidence.


Are there any logs about MoveToDeletedItems? Yes There are 3 records.

Do you added the -Mailbox sharedmailbox when using Get-Inboxrule?

yes

what if you recover these items to the inbox, will them be deleted after a while? No , after recovering items , no any action


Solution 1:

Are there any logs about MoveToDeletedItems? Please also use Get-Mailbox SharedMailbox | FL *Audit* to check what actions could be recorded.

Do you added the -Mailbox sharedmailbox when using Get-Inboxrule?

And what if you recover these items to the inbox, will them be deleted after a while?

You could try repairing the mailbox with New-MailboxRepairRequest.

Sorry that I was meant to add a comment, but it said that the point should be 50 to do so.