When you use a new accepted domain as the default domain in a Microsoft Exchange Server 2016 environment, some Active Monitoring probes may be in failed status. Additionally, you may receive the following error message:
+ ResultName: AutodiscoverCtpProbe/EXHR-0765.EXHR-0765dom.extest.microsoft.com
- Error System.Exception: >>> Autodiscover Soap Endpoint Verification AuthMethod=Negotiate AutodUrl=https://localhost/autodiscover/autodiscover.svc GetUserSettings (Attempt #0) Status=The request failed. The remote server returned an error: (401) Unauthorized.
This issue occurs because the user principal name of the monitoring mailbox isn't constructed correctly.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.