When I add the script (had to figure out what all to include into my php-page too) I get this error: Fatal error: Uncaught SoapFault exception: [Client] SoapClient::__doRequest() returned non string value in /var/www/qbmt/calendar/ews/ExchangeWebServices.php:314 Stack trace: #0 [internal function]: SoapClient->__call('FindFolder', Array) #1 /var/www/qbmt/calendar/ews/ExchangeWebServices.php(314): NTLMSoapClient_Exchange->FindFolder(Object(EWSType_FindFolderType)) #2 /var/www/qbmt/calendar/index.php(34): ExchangeWebServices->FindFolder(Object(EWSType_FindFolderType)) #3 {main} thrown in /var/www/qbmt/calendar/ews/ExchangeWebServices.php on line 314 This is the basic example

Check the value of $response in NTLMSoapClient::__doRequest() (currently line 80). If the value is NULL check http://code.google.com/p/php-ews/issues/detail?id=11. I should really add a check for this and throw an exception.

This issue has been moved to GitHub https://github.com/jamesiarmes/php-ews/issues/14