Your company has a hybrid deployment of Office 365 that uses single sign-on. The company uses the contoso.com SMTP domain. You have a server named ADFS_Server5 that has the Active Directory Federation
Services (AD FS) 2.0 server role installed. A power failure occurs at the data center. Power is restored at the data center. You need to verify that AD FS functions on ADFS_Server5.

What should you do?

A.
Run the Test-MapiConnectivity cmdlet.

B.
Connect to https://ADFS_Server5.tailspintoys.com/adfs/ls/default.aspx

C.
Connect to https://ADFS_Server5.contoso.com/adfs/fs/federationserverservice.asmx.

D.
Run the Test-Connectivity cmdlet.

Explanation:

To verify that a federation server is operational
References: https://technet.microsoft.com/en-us/library/cc780059(v=ws.10)