I am trying to write a program that checks for changes in a mailbox’s calendar every time it runs and updates a database. My problem begins at the very top of the assignment when I initialize the  ExchangeService instance and any function I try to run on it returns 

The request failed. The remote server returned an error: (401) .

 I initialized it like this: 

private static void initExchangeService()
{
m_ExchangeService = new ExchangeService();
m_ExchangeService.UseDefaultCredentials = true;
m_ExchangeService.KeepAlive = true;

string domain = ConfigurationManager.AppSettings[“Domain”];
m_ExchangeService.Credentials = new System.Net.NetworkCredential(CREATOR_MAIL, CREATOR_PASSWORD, domain);
m_ExchangeService.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, CREATOR_MAIL);
if (string.IsNullOrEmpty(EXCHANGE_URL))
{
m_ExchangeService.AutodiscoverUrl(CREATOR_MAIL);
}
else
{
m_ExchangeService.Url = new Uri(EXCHANGE_URL);
}

writeToLog($”Initialized exchange service for {CREATOR_MAIL}”, MESSAGE);
}

The mailbox I am trying to access has 2-step authentication disabled and I worked with the system admin to ensure on our end that I have the permissions I need to run this but any address I try (even non real ones) returns the same error.

I’d love some help figuring out what the problem is.

​I am trying to write a program that checks for changes in a mailbox’s calendar every time it runs and updates a database. My problem begins at the very top of the assignment when I initialize the  ExchangeService instance and any function I try to run on it returns    The request failed. The remote server returned an error: (401) .    I initialized it like this:     private static void initExchangeService()
{
m_ExchangeService = new ExchangeService();
m_ExchangeService.UseDefaultCredentials = true;
m_ExchangeService.KeepAlive = true;

string domain = ConfigurationManager.AppSettings[“Domain”];
m_ExchangeService.Credentials = new System.Net.NetworkCredential(CREATOR_MAIL, CREATOR_PASSWORD, domain);
m_ExchangeService.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, CREATOR_MAIL);
if (string.IsNullOrEmpty(EXCHANGE_URL))
{
m_ExchangeService.AutodiscoverUrl(CREATOR_MAIL);
}
else
{
m_ExchangeService.Url = new Uri(EXCHANGE_URL);
}

writeToLog($”Initialized exchange service for {CREATOR_MAIL}”, MESSAGE);
}   The mailbox I am trying to access has 2-step authentication disabled and I worked with the system admin to ensure on our end that I have the permissions I need to run this but any address I try (even non real ones) returns the same error. I’d love some help figuring out what the problem is.  Read More

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