I am encountering a strange problem where a user has full access and send on behalf of permissions for a mailbox, but the permissions do not seem to be working as they should. When the user attempts to compose a new e-mail message using the address of said mailbox in the From field, they receive the following bounce back:
"Delivery has failed to these recipients or distribution lists:
Name (name@example.com)
You are not allowed to send this message because you are trying to send on behalf of another sender without permission to do so. Please verify that you are sending on behalf of the correct sender, or ask your system administrator to help you get the required permission."
As far as I can tell, I have set the required permission in the exchange management console (mail flow settings -> delivery options -> send on behalf of).
The user in question is using Outlook 2010 and our Exchange server is 2007. Any help with this would be greatly appreciated.
Best Answer
The proper way of doing this is: Open Exchange Console, navigate to Recepient Configuration, Mailbox. Right click on the user and "Manage send as permissions", give the permissions to the required user. What you're looking for is SEND AS and not SEND ON BEHALF.