When you attempt to connect Microsoft Dynamics CRM 2013 for Microsoft Office Outlook to a CRM Online 2015 organization, you encounter the following error:
"There is a problem communicating with the Microsoft Dynamics CRM server. The server might be unavailable. Try again later. If the problem persists, contact your system administrator."
You typed the URL for your CRM Online organization instead of selecting CRM Online from the drop-down list.
Instead of typing the URL, select CRM Online from the drop-down list.
NOTE: It is also possible to enter the Discovery Service URL (ex. https://disco.crm.dynamics.com). You can locate your Discovery Service URL within the Microsoft Dynamics CRM web application by clicking Settings | Customization | Developer Resources.
If you are still encountering issues connecting CRM for Outlook to your CRM Online organization, a diagnostic tool is available to help diagnose the issue:
CRM for Outlook Configuration Diagnostic
The following error can be found in the log file:
12:56:39| Error| Error connecting to URL: https://