Action: Acquire certificates for Exchange 2013 hybrid server(s) In an Exchange hybrid deployment, digital certificates are ...

Action: Acquire certificates for Exchange 2013 hybrid server(s)  In an Exchange hybrid deployment, digital certificates are an important part of securing the communication between the on-premises Exchange Server organization and Office 365.  Certificates enable each Exchange organization to trust the identity of another. Certificates also help to ensure that each Exchange organization is communicating to the right source. Learn more at Certificate requirements for hybrid deployments.