[E2007][EWS][C#][Windows]: Cannot delete delayed delivery emails

Question

I am using EWS to schedule delayed delivery emails in advance for a package management system. When a package is "logged" the system creates two delayed delivery emails, one 7 days out and one 14 days out to remind the package recipient they have a package
waiting for pickup.
When the package is picked up the system is supposed to delete the scheduled emails. This is where I am having trouble.
It seems EWS does not allow you to delete a delayed delivery email - you must use a desktop Outlook client to do so. Can someone explain the logic behind this? Are there any plans for future support of deleting delayed emails through EWS?

Answer 1

EWS doesn't run against Outlook.  It runs against the Exchange Server.  Exchange Server has a copy of all the mailboxes that you see in everybody's outlook clients.  When you connect to a mailbox in EWS using the discovery service, you are
connecting to the copy of the email box that sits inside the server.
To connect to just the server without connecting to a mailbox, do the following:
//connect to the exchange server by server name
ExchangeService service =
new ExchangeService(ExchangeVersion.Exchange2007_SP1);
service.Credentials =
new WebCredentials(strAccount, strPassword, strDomain);
service.Url =
new Uri("https://" + strExchangeServer +
"/ews/exchange.asmx");
The name of the exchange server is usually remote.yourEmailDomainName,  however, this could have been changed by your administrator.  You can usually find the name of the server by printing the service.Url of a connected
mailbox.
Once you connect to the server, all the EWS commands work on objects outside of mailboxes