Microsoft (Standard):
https://outlook.office365.com/autodiscover/autodiscover.xml
Microsoft (German Cloud):
https://autodiscover-s.outlook.de/autodiscover/autodiscover.xml
DomainFactory:
https://exchange2013.df.eu/autodiscover/autodiscover.xml
QualityHosting:
https://ews.de2.hostedoffice.ag/autodiscover/autodiscover.xml
