To perform this procedure, the account you use must be delegated the following:

• Exchange Recipient Administrator role
  

For more information about permissions, delegating roles, and the rights that are required to administer Exchange Server 2007, see Permission Considerations.

 To use the Exchange Management Console to enable or disable MAPI for a mailbox user

1. Start the Exchange Management Console.

2. In the console tree, expand Recipient Configuration, and then click Mailbox.

3. In the result pane, select the mailbox user for whom you want to enable or disable MAPI.

4. In the action pane, under the mailbox user's name, click Properties.

5. In <Mailbox User> Properties, on the Mailbox Features tab, click MAPI, and then click either Enable or Disable.

6. Click OK.

 To use the Exchange Management Shell to enable and disable MAPI for a mailbox user

• Run the following command to enable MAPI for the user John:

  Set-CASMailbox -Identity John -MAPIEnabled $true

• Run the following command to disable MAPI for the user John:

  Set-CASMailbox -Identity John -MAPIEnabled $false

For detailed syntax and parameter information, see the Set-CASMailbox reference topic.

For more information about the Exchange Management Shell, see Using the Exchange Management Shell.