You configure a Microsoft Outlook profile for the shared mailbox and own credentials to access it. You send an message from this Outlook profile. Try sending the message again later, or contact your network administrator.
Error is [0x]. You do not have the permission to send the message on behalf of the specified user. Error is [0xxdc-0x].
And if you are running Outlook in Online mode, you receive the following error message: You do not have the permission to send the escorts in hilo on behalf of the specified users. If you don't have Send As permissions for the shared mailbox, Outlook can't send the message. Resolution Grant Send As permission to the user for the shared mailbox.
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