Really confused here, we use Exchange 2010 and one of our users (call them Alice) is having all their mail auto-forwarded to another user (call them Bob).
Alice has no rules set up at all and looking at the Exchange Management console, there is no auto-forwarding set up on her mailbox.
I ran this PowerShell:
get-mailbox -Identity Alice@domain.tld | select-object Name, ForwardingAddress
And it showed no ForwardingAddress. I ran another one:
$mbox = Get-Mailbox -Identity Alice@domain.tld; $mbox | Foreach {Get-Inbox Rule -Mailbox $_}
And the only rule that was there was the "Clear categories on mail" one.
I am entirely stumped by this one as those are the only two places I know of that have anything to do with auto-forwarding messages.
Any help would be awesome.