It may take up to a minute before the test is complete. Make sure that Use AutoDiscover is selected. This subsection applies to Outlook for Windows clients only. Outlook for Mac does not have Test E-mail AutoConfiguration tool available.
Microsoft Remote Connectivity Analyzer will help to determine domain-wide issues in the autodiscover configuration while the Test E-mail AutoConfiguration tool is useful with the situations where one or several users are affected. It is one of the important troubleshooting steps when you are experiencing any of Autodiscover Related Issues. This article guides on how to use tools that can help to indicate incorrect autodiscover resolution for a particular user and/or device.