Exchange 2010 SP1 Delegate user "Sent on Behalf" not showing in emails

Question

I am trying to set up a user to be a delegate to another users account so that they can answer email messages while the other user is away.  When I add them as a delegate either through exchange (Delivery Options -> send on behalf -> grant this
permission to:) or with outlook, the user is able to send and reply to emails sent to the other user, but it looks like the Actual user is sending the email.  It is not adding the Sent on behalf of text to the FROM line.
I cannot seem to find a way to enable this text to be added to the emails.  Any help with this would be appreciated.

Answer 1

 
Hi,
Based on your description, I understand that you have a delegate and the delegate can send email as your mailbox, but you just grant him send on behalf permission, am I right? If I misunderstand your
concern, pleas feel free to correct me.
First, please run the command Get-Mailbox -Identity your name |Select-Object GrantSendOnbehalfTo, and check whether your delegate will be listed.
And then, run the command Get-Adpermission -Identity you name -user your delegate |fl and check output.
At last, please make sure that when your delegate send or reply a email, he choose from filed. In Outlook, by default, it will send or reply email by the mailbox owner.
I look forward to hearing from your update.
Best regards,
Serena
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