You have an Exchange Server 2013 organization named for Contoso. A user named Admin1 is a member of the Domain Admins gr

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You have an Exchange Server 2013 organization named for Contoso.
A user named Admin1 is a member of the Domain Admins group.
Admin1 fails to synchronize a new Windows Phone device by using Exchange ActiveSync and receives an HTTP 500 error message. Admin1 successfully logs on to Outlook Web App and Outlook Anywhere.
You need to ensure that Admin1 can synchronize the new Windows Phone device by using Exchange ActiveSync.
What should you do?

A. Install a trusted root certificate on the Windows Phone device.
B. Create a new mobile device mailbox policy.
C. Enable permission inheritance on the Admin1 user account.
D. Disable permission inheritance on the Admin1 user account.