“An unsecured or incorrectly secured fault was received from the other party. See the inner FaultException for the fault code and detail.”
When you used https://dev.crm.dynamics.com to connect into CRM online to register plugin, you will get above error message and you may end up with no solution to fix this issue. There are many blogs and troubleshooting items in MSDN to fix this issue and none of them will help you now with latest CRM online environment. I couldn’t find any blog related to this new issue and found the solution myself. There are many blogs created in last year, which may mislead you now since they tell you to use https://dev.crm.dynamics.com as discovery URL to connect into CRM online.
Actually those blogs are not valid any more. With latest MS CRM online, we must use URL, which is used to browse CRM using browser that is https://<OrganizationName>.crm.dynamics.com
--Thushara Manchanayake--
