Which two actions should you perform?

Your company plans to migrate from On-Premises Exchange to Exchange Online in Office 365.

You plan to integrate your existing Active Directory Domain Services (AD DS) infrastructure with Azure AD.

You need to ensure that users can log in by using their existing AD DS accounts and passwords. You need to achieve this goal by using minimal additional systems.

Which two actions should you perform? Each answer presents part of the solution.
A . Configure Password Sync.
B . Set up a DirSync Server
C . Set up an Active Directory Federation Services Server
D . Set up an Active Directory Federation Services Proxy Server

Answer: A,B

Explanation:

Azure AD supports the following four directory integration scenarios:

* DirSync with Password Sync C Used when you want to enable your users to sign in to Azure AD and other services using the same user name and password as they use to log onto your corporate network and resources. Password sync is a feature of the Directory Sync tool.

Etc.

Explanation: https://msdn.microsoft.com/en-us/library/azure/jj573653.aspx