When trying to connect to Dynamics 365 from a console application.(using C# code).
For 9 hours below error occurred. After that time code started working properly without making any change in code.
Connectivity to CDAX CRM has failed: System.InvalidOperationException: Metadata contains a reference that cannot be resolved: 'https://login.external.hp.com/pf/sts_mex.ping?PartnerSpId=urn:federation:MicrosoftOnline'. ---> System.Net.WebException: The remote server returned an error: (400) Bad Request.
Does anyone know what causes this issue?