public static ExchangeService ConnectToServiceWithImpersonation(
IUserData userData,
string impersonatedUserSMTPAddress,
ITraceListener listener)
{
ExchangeService service = new ExchangeService(userData.Version);
if (listener != null)
{
service.TraceListener = listener;
service.TraceFlags = TraceFlags.All;
service.TraceEnabled = true;
}
service.Credentials = new NetworkCredential(userData.EmailAddress, userData.Password);
ImpersonatedUserId impersonatedUserId =
new ImpersonatedUserId(ConnectingIdType.SmtpAddress, impersonatedUserSMTPAddress);
service.ImpersonatedUserId = impersonatedUserId;
if (userData.AutodiscoverUrl == null)
{
service.AutodiscoverUrl(userData.EmailAddress, RedirectionUrlValidationCallback);
userData.AutodiscoverUrl = service.Url;
}
else
{
service.Url = userData.AutodiscoverUrl;
}
return(service);
}
private static async System.Threading.Tasks.Task Run()
{
var configuration = new ConfigurationBuilder()
.AddUserSecrets("a8aa09bf-0683-4154-81b4-9fd6392e0a74")
.Build();
var webCredentials = new WebCredentials(configuration["Username"], configuration["Password"]);
var impersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, configuration["Email"]);
var uri = new Uri("https://outlook.office365.com/EWS/Exchange.asmx");
var service = new ExchangeService(ExchangeVersion.Exchange2010_SP1)
{
ImpersonatedUserId = impersonatedUserId,
Credentials = webCredentials,
Url = uri
};
var folderId = new FolderId(WellKnownFolderName.Calendar);
var propertySet = new PropertySet(BasePropertySet.IdOnly, AppointmentSchema.Start, AppointmentSchema.AppointmentType);
var syncFolder = await service.SyncFolderItems(folderId, propertySet, null, 512, SyncFolderItemsScope.NormalItems, null);
foreach (var itemChange in syncFolder)
{
if (itemChange.Item is Appointment appointment && appointment.AppointmentType == AppointmentType.RecurringMaster)
{
var collection = await OccurrenceCollection.Bind(service, appointment.Id);
foreach (var item in collection)
{
Console.WriteLine(item.Start.ToString("g"));
}
}
}
}
private ExchangeService CreateImpersonatedService(ImpersonatedUserId UserId, ExchangeCredentials exchangeCredentials)
{
return(new ExchangeService(this.exchangeVersion)
{
Credentials = exchangeCredentials, ImpersonatedUserId = UserId
});
}
// This private method creates a new ExchangeService object using the email addresess and credentails passed from the
// public methods.
private static ExchangeService InternalConnectToService(string emailAddress, ICredentials credentials, string impersonatedUserEmail)
{
Console.Write(" Calling Autodiscover service to get Exchange endpoint...");
ExchangeService service = new ExchangeService(ServerVersion);
if (TraceListener != null)
{
service.TraceListener = TraceListener;
service.TraceFlags = TraceFlags.All;
service.TraceEnabled = true;
}
service.Credentials = (NetworkCredential)credentials;
if (!string.IsNullOrEmpty(impersonatedUserEmail))
{
ImpersonatedUserId impersonatedUserId =
new ImpersonatedUserId(ConnectingIdType.SmtpAddress, impersonatedUserEmail);
service.ImpersonatedUserId = impersonatedUserId;
}
service.AutodiscoverUrl(emailAddress, RedirectionUrlValidationCallback);
Console.WriteLine("complete.");
Console.WriteLine(string.Format(" EWS URL: {0}", service.Url));
return(service);
}
static ExchangeService ConnectService(string emailAddress, string password, string url, ExchangeVersion version = ExchangeVersion.Exchange2013_SP1, bool trace = false)
{
ImpersonatedUserId impersonatedUserId = null;
NetworkCredential networkCredentials = null;
if (networkCredentials == null)
{
networkCredentials = new NetworkCredential(emailAddress, password);
}
var service = new ExchangeService(version, TimeZoneInfo.Utc)
{
ImpersonatedUserId = impersonatedUserId,
Credentials = networkCredentials,
// SCP is slow and only applies to in-network Exchange
// see https://blogs.msdn.microsoft.com/webdav_101/2015/05/11/best-practices-ews-authentication-and-access-issues/
EnableScpLookup = false,
UserAgent = "MSBotFramework"
};
// set X-AnchorMailbox when impersonation is used
// https://blogs.msdn.microsoft.com/webdav_101/2015/05/11/best-practices-ews-authentication-and-access-issues/
// https://blogs.msdn.microsoft.com/mstehle/2013/07/25/managing-affinity-for-ews-impersonation-in-exchange-2013-and-exchange-online-w15/
if (service.ImpersonatedUserId?.Id != null)
{
service.HttpHeaders.Add("X-AnchorMailbox", service.ImpersonatedUserId.Id);
}
if (trace)
{
service.TraceEnablePrettyPrinting = true;
service.TraceFlags = TraceFlags.All;
service.TraceListener = ConsoleTraceListener.Instance;
service.TraceEnabled = true;
}
if (!string.IsNullOrEmpty(url))
{
service.Url = new Uri(url);
}
else
{
service.AutodiscoverUrl(emailAddress, RedirectionUrlValidationCallback);
}
return(service);
}
static void Main(string[] args)
{
// Get the email address of the account to impersonate.
Console.Write("Email address to impersonate: ");
string impersonatedEmailAddress = Console.ReadLine();
// Add the imersonated account to the Exchange service object.
ImpersonatedUserId impersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, impersonatedEmailAddress);
service.ImpersonatedUserId = impersonatedUserId;
CreateFolder(service, "Custom Folder", WellKnownFolderName.Inbox);
Console.WriteLine("\r\n");
Console.WriteLine("Press or select Enter...");
Console.Read();
}
