You are the adm

inistrator for a company named Contoso, Ltd.

The company has an Office 365 subscription.

You need to prevent users from changing their user display name by using Outlook Web App.

What should you do?

A. Run the

Set-MsolCompanyContactInformation

cmdlet.

B. Modify the default email address policy.

C. Run the

Set-MsolUserPrincipalName

cmdlet.

D. Modify the default role assignment policy.

References: http://help.outlook.com/en-us/140/ff852817.aspx