Symptoms

Office 365 Syndication application instance returns the following error on attempt to use the Test connection button:

Cannot execute 'Test connection'. Сheck parameters of application instance and application endpoint configuration and try again. Request: http://www.microsoftonline.com/MOSI/1/0/action/Ping

Cause

The following application instance properties are mandatory:

  • ID of Native Client for Partner Center SDK
  • ID of Native Client for Azure AD Graph API

    But they cannot be specified for Syndication application instance since Syndication Partner Scenario reached its end of live on the Microsoft side and not supported by Office 365 Development team.

Resolution

Do not use Syndication application instances, switch to CSP Partner Scenario.

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