Hi All
We recently deployed CRM internally for an organization and they required SSL to be used for all traffic even inside their network, they also were using SSL offload on a Load Balancer to do the HTTPS between the client and Load Balancer and then HTTP from the Load Balancer to the CRM web Server array. The issue for the Outlook client configuration wizard is that it queries the web service for a definition and the server replies with a HTTP host name for the client to then query the service.
The simple fix for any SSL offload Load balancing scenario is to use a URL Rewrite rule on your CRM Website that selectively parses the response to the definition request and replace the http://<WEBSITE> reference with the HTTPS://<WEBSITE>. This approach is generic and should work with any SSL offload load balancer.
To do this create a new Outbound URL Rewrite rule that has a precondition to only parse
{Response_content_Type} = ^text/xml
{URL} = .svc
Then create a Match section that has Matching scope set to "Response"
and the Pattern "HTTP://<loadBalanced FQDN>"
and ignore case
In the action section perform an Rewrite action type and in the Action Properties value
"https://<loadBalanced FQDN>"
Replace the <loadBalanced FQDN> with your load balanced hostname.
This will correctly provide the CRM Outlook Add in client the HTTPS url that it needs to continue correctly with.
Depending on the version of URL Rewrite installed you could create the pattern matching and rewrite sections to use the host header values instead of hardcoding them like the example above.