You deploy a Microsoft Exchange mobile messaging solution that uses Microsoft Windows Mobile 5.0 with Microsoft Messaging and Security Feature Pack.   The messaging infrastructure is configured to support the remote wipe feature.   When an administrator attempts to perform a remote wipe of a Windows Mobilebased device， the administrator receives a 401 error message.   You need to ensure that the administrator is authorized to perform remote wipes only.   What should you do？（）

• A、Grant the administrator membership in the Domain Administrators group.
• B、Grant the administrator membership in the Exchange Administrators group.
• C、Add the new administrator account to the Discretionary Access Control List （DACL） of the Microsoft Exchange ActiveSync Administration folder.
• D、Select the Directory Security tab of the Exchange Server administration Web site， and then configure Read， Write， and Directory Browsing permissions.