I have Created WCF REST API which use the EWS Managed API to use the Exchange server functionality. WCF REST API provides the request and and response format in json.
But for each client request, I need to do authentication and to create Exchange service object on WCF Rest API.
Also I can't manage the session for each client.
So is there any way to authenticate the user only one time and creating the service object. and This service object will be used for all other request of that specific user.??