You have an Exchange Server 2010 organization.You need to prevent users in the organization from changing passwords by using Outlook Web App.The solution must not prevent users from changing passwords by using Windows. What should you do？ （）

• A、From the properties of the user accounts， configure the settings on the Account tab.
• B、From the properties of the mailboxes， configure the settings on the Mailbox Features tab.
• C、From the properties of the OWA virtual directory， configure the settings on the Segmentation tab.
• D、From the properties of the OWA virtual directory， configure the settings on the Authentication tab.