Issues with SCIM implementation Azure AD

Hi,

We are trying to implement SCIM via Azure AD to Zendesk and following Microsofts documentation here https://learn.microsoft.com/en-us/azure/active-directory/saas-apps/zendesk-provisioning-tutorial but I am hitting a provisioning setup error.

It keeps failing with Error code: ZendeskSubdomainValidationFailed and from what I can see I have the right domain (I think) and other settings look correct.

This is the step I am following and I have entered my account email address that is in Zendesk here (which has admin rights in Zendesk - I will change to this to a service account once I have POC in place) and the API token steup in zendesk.com/admin/apps-integrations/apis/zendesk-api.

The main area that looks to be failing is the domain which should be like this "https://domainhere.zendesk.com" I believe.

Is there something obvious I am missing here? I have setup SCIM & SSO many times but I can't find anything wrong nor documents from Zendesk to assist with the setup here.