The Discovery Service is down and is impacting multiple customers in EMEA and APAC. Customers are able to access their orgs, but are not able to sign into CRM outlook client, SDK plug in registration tool, and the email router. We are taking the necessary steps to correct this at this time. We apologize for the inconvenience this has caused.
Update:
The issue has been mitigated and the discovery service is now functional. Customers are now able to sign into the CRM Outlook client, SDK plug in registration tool, and the email router. We will be monitoring the situation for the coming hours and apologize for the inconvenience this has caused.