Author: MiningOmerta
Finds indexed Microsoft Exchange Servers (Includes Office 365) for e-mail synchronization.
site:*/EWS/Exchange.asmx
link:
https://www.google.com/search?q=site%3A*%2FEWS%2FExchange.asmx
or
https://www.google.com/search?q=site%3A*%2FEWS%2FExchange.asmx+-contoso
if you don’t want the “Hello World” of Microsoft Domains :)