I just finished deploying a Hybrid configuration for Office 365 and Exchange 2013. Everything went fine but when I validate my outbound connector it fails with the following error:
450 4.4.316 Connection refused [Message=Socket error code 10061]
[LastAttemptedServerName=owa.glaciercap.com] [LastAttemptedIP=188.8.131.52:25] [CY1NAM02FT039.eop-nam02.prod.protection.outlook.com]
I white-listed all the EOP IPs in our firewall so I'm not sure why this is happening. Did I miss something?