If you receive "Something went wrong, and Outlook couldn't set up your account" in Outlook while creating a new account that's tied to 365:

• Make sure the system time is correct.
• Confirm that autodiscover.yourdomain.com resolves to Microsoft (autodiscover.outlook.com)
• Confirm that your root domain website, host or parking page isn't serving a conflicting autodiscover.xml i.e. https://<RootDomain>/AutoDiscover/AutoDiscover.xml
  You may need to override this temporarily using this fix from Microsoft, but it's best to fix the underlying issue.