I'm trying to configure SCIM application to sync users/groups with our test sever. Our test application is code from https://github.com/AzureAD/SCIMReferenceCode. Also we were able to test it from external locations with postman and can see that our test application works correctly. But, when we trying to setup provisioning in Azure AD and press "Test Connection", we get the next error message:
You appear to have entered invalid credentials. Please confirm you are using the correct information for an administrative account.
Error code: SystemForCrossDomainIdentityManagementCredentialValidationUnavailable
Details: We received this unexpected response from your application:
Message: An error occurred while sending the request.
Please check the service and try again.
Request-id: b7f7971e-4dfb-4f53-ab9d-8a5bc6d380d6
As we can there is no much details in the message, also as we checked on our web server - it doesn't receive any http request from Azure at all.
We use https://our_domain_name/scim/ as a Tenant URL and Secret token field is populated with pure token value.