c# - Exchange Web Services - accessing calendar of group mailbox using service account -


i trying access group mailbox using exchange web services.

a domain account full access group mailbox has been setup, getting following error:

when making request account not have mailbox, must specify mailbox primary smtp address distinguished folder ids.

my code below:

exchangeservice service = new exchangeservice(exchangeversion.exchange2013);  service.usedefaultcredentials = false; service.credentials = new webcredentials("serviceaccount", "<password>");  //find web service url service.autodiscoverurl("<group mailbox email address>", redirectionurlvalidationcallback);  //find calendar id folderid folderid = new folderid(wellknownfoldername.calendar, new mailbox("<group mailbox email address>"));  //find calendar calendarfolder calendar = calendarfolder.bind(service, folderid);  //create calendarview calendarview view = null;  var propertyset = new propertyset(     appointmentschema.id,     appointmentschema.subject,     appointmentschema.start,     appointmentschema.end );  view = new calendarview(datetime.now.addmonths(-1), datetime.now.addmonths(1)); view.propertyset = propertyset;  //get appointments var appointments = calendar.findappointments(view); 

is there way of achieving without setting mailbox service account?

when run above code credentials, there no issues (i have full permission group mailbox, , mailbox of own).

use impersonation. code works great me connect shared mailbox service account.

exchangeservice service = new exchangeservice(exchangeversion.exchange2013_sp1); service.credentials = new networkcredential(service_acct, password);  // set impersonation shared mailbox service.impersonateduserid = new impersonateduserid(connectingidtype.smtpaddress, "sharedmbx@contoso.com"); 

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