External access to exchange server LB

[Al Zabar]

All,

 

I based my exchange configuration on following article - https://citrixguyblog.com/2017/07/22/citrix-netscaler-loadbalancing-exchange-20132016-walkthrough-guide/. All has been deployed in my internal network, load balanced 2 exchange servers, to allow access for internal users. Now I must configure external access via netscaler gateway, where I have added service pointing to internal LB and bound to LB on 443 port, but receiving Http/1.1 Service Unavailable. Not sure if authentication or anything else is required on gateway.

 

Same issue with accessing sharepoint externally and all fine internally.

 

Much appreciate for your assistance