Which statement about the Cisco Webex hybrid service is true?
A. Expressway Connector is required for an on-premises Exchange server.
B. Hybrid Message service works only with Jabber cloud deployment.
C. Directory Connector is required for Azure AD.
D. Directory Connector must be deployed for OBTP to work with on-premises video devices.
Answer is A
Expressway Connector is required for an on-premises Exchange server.