Lien de test microsoft : https://testconnectivity.microsoft.com
https://developer.mozilla.org/en-US/docs/Mozilla/Thunderbird/Autoconfiguration
https://docs.microsoft.com/en-us/previous-versions/office/exchange-remote-connectivity/dd439386(v=exchg.80)
https://docs.microsoft.com/en-us/previous-versions/office/office-2010/cc511507(v=office.14)#precedence-for-xml-settings