A user cannot send an email message on behalf of another user or send an email message as another user

Article ID: 2518898 - View products that this article applies to.
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Symptoms

In Microsoft Office 365 dedicated, a user says that he or she cannot perform one or both of the following actions:
  • Send an email message on behalf of another user.
  • Send an email message as another user.
When the user tries to perform any of these actions, the following symptoms may occur:
  • The user receives the following error message:
    You do not have the permission to send the message on behalf of the specified user.
  • The email message is sent. However, the user receives a non-delivery report (NDR) that contains the following text:
    You are not allowed to send this message because you are trying to send on behalf of another user 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

Cause

The user is who trying to send the message does not have "Send on Behalf" permissions or Send As permissions to the mailbox.

Resolution

To resolve this issue, use one of the following methods, as appropriate for your situation.

Method 1: Grant "Send on Behalf" permissions to the user

The Delegate Access feature in Microsoft Outlook enables you to grant additional permissions, such as letting a delegate create email messages or respond to meeting requests on your behalf. A delegate automatically receives "Send on Behalf" permissions.

In Microsoft Outlook 2010

To designate a user as your delegate in Outlook 2010, follow these steps:
  1. Click the File tab, click Account Settings, and then click Delegate Access.
  2. In the Delegates dialog box, click Add.
  3. Type the name of the person whom you want to designate as your delegate, or search for and then click the name in the search results list.

    Note The delegate must be a person in the Microsoft Exchange global address list (GAL).
  4. Click Add, and then click OK.
  5. In the Delegate Permissions dialog box, accept the default permissions settings or select custom access levels for Exchange folders.
  6. To send a message to notify the delegate of the changed permissions, click to select the Automatically send a message to delegate summarizing these permissions check box.
  7. If you want to grant additional permissions for the delegate to view private items, click to select the Delegate can see my private items check box.
  8. Click OK two times.
In Microsoft Office Outlook 2007

To designate a user as your delegate in Outlook 2007, follow these steps:
  1. On the Tools menu, click Options.
  2. Click the Delegates tab, and then click Add.
  3. Type the name of the person whom you want to designate as your delegate, or search for and then click the name in the search results list.

    Note The delegate must be a person in the Exchange global address list (GAL).
  4. Click Add, and then click OK.
  5. In the Delegate Permissions dialog box, accept the default permissions settings or select custom access levels for Exchange folders.
  6. To send a message to notify the delegate of the changed permissions, click to select the Automatically send a message to delegate summarizing these permissions check box.
  7. If you want to grant additional permissions for the delegate to view private items, click to select the Delegate can see my private items check box.
  8. Click OK.

Method 2: Grant Send As permissions to the user

The following methods can be used to grant a user Send As permissions:
  • Method 1: Set Send As permissions in your environment. MMSSPP will synchronize this to the managed environment.
  • Method 2: Use Remote PowerShell to set Send As permissions in the managed environment. For more information about Remote PowerShell, see page 39 of the Remote PowerShell Self-Service Guide.
  • Method 3: Contact Microsoft Online Services Support (MOSSUP) by online submission or by telephone. MOSSUP will add the permissions by using Windows PowerShell only. This is usually for bulk reasons.

Properties

Article ID: 2518898 - Last Review: July 29, 2013 - Revision: 7.0
Applies to
  • Microsoft Business Productivity Online Dedicated
Keywords: 
vkbportal226 KB2518898

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