Exchange integration Arcsight SOAR (IMAP)

Hi, 

I have configured Exchange integration in SOAR but I have problem with polling for mail. In settings I set IP address of Exchange but I see error with connection to server. In log is domain name of Exchange which is not resolved. 

[ERROR] [task-scheduler-2] o.s.i.handler.LoggingHandler [LoggingHandler.java:187] org.springframework.messaging.MessagingException: failure occurred while polling for mail; nested exception is com.sun.mail.util.MailConnectException: Couldn't connect to host, port: ex.test.com, 993; timeout -1; nested exception is: java.net.UnknownHostException: ex.test.com at ...

Where can I change this value?

 

Thanks