Microsoft Exchange

Unable to Send/Forward on behalf of User/Shared Mailbox

Error: 578:0x000004DC:0x0000001D
Message: 'You can't send a message on behalf of this user unless you have permission to do so. Please make sure you're sending on behalf of the correct sender, or request the necessary permission. If the problem continues, please contact your helpdesk.'

Solution:

1. Login to EMC
   1. Recipient Configuration
   2. Mailbox
   3. Right + Click User/Mailbox -> Properties
   4. Under the Mail Flow Settings tab -> Delivery Options
   5. Under "Grant this permission to:", "Add" the user that needs to send on behalf of this account

Exchange Server Troubleshooting

Use Telnet to test SMTP communication on Exchange servers