How to move an email from user mailbox to shared mailbox using apps for office mail app

Question

How can I move an email from a users main mailbox to a shared mailbox using apps for office.  I know I can do this manually but i am creating an for owa/outlook that would be a button to move the item.  I have tried using ews but can only find
the commands to move emails inside the users mailbox
for example : 
'<?xml version="1.0" encoding="utf-8"?>' +
        '<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"' +
        '               xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages"' +
        '               xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types"' +
        '               xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">' +
        '  <soap:Header>' +
        '    <t:RequestServerVersion Version="Exchange2013" />' +
        '  </soap:Header>' +
        '  <soap:Body>' +
        '    <m:MoveItem>' +
        '      <m:ToFolderId>' +
        '        <t:DistinguishedFolderId Id="junkemail" />' +
        '      </m:ToFolderId>' +
        '      <m:ItemIds>' +
        '        <t:ItemId Id="' + id + '" ' +
        '                  ChangeKey="' + changeKey + '" />' +
        '      </m:ItemIds>' +
        '    </m:MoveItem>' +
        '  </soap:Body>' +
        '</soap:Envelope>';
Can I create a xml that would would do this?  Is there a way to do it using the EWS service reference.  I do not want to use import/export to do this.  

Answer 1

yes I was able to make it work using Microsoft.Exchange.WebServices.Data and writing it as a web API,  however i am unable to to authenticate the user if it is hosted on another server (without them retyping their password.  I assume that
their is a matching java script version of what i am doing on the api side.  I am just stuck trying to figure it out.  the below code works as a Web Api if i could authenticate the user.    
            ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2013);
            service.Url = new Uri("Ews url");
            service.Credentials = CredentialCache.DefaultCredentials;
            //service.UseDefaultCredentials = true;
            // Create a new folder view, and pass in the maximum number of folders to return.
            FolderView view = new FolderView(5);
            // Create an extended property definition for the PR_REPLICA_LIST property.
            ExtendedPropertyDefinition PR_REPLICA_LIST = new ExtendedPropertyDefinition(0x6698, MapiPropertyType.Binary);
            view.PropertySet = new PropertySet(BasePropertySet.IdOnly, FolderSchema.DisplayName, PR_REPLICA_LIST);
            // get to the inbox folder of spam mailbox
            Mailbox SpamMailbox = new Mailbox("Smtp of other mailbox");
            FolderId SpamInbox = new FolderId(WellKnownFolderName.Inbox, SpamMailbox);
            Folder SpamFolder = Folder.Bind(service, SpamInbox);
            FindItemsResults<Item> findItems = service.FindItems(WellKnownFolderName.JunkEmail, new ItemView(10));
            foreach (Item item in findItems)
                item.Load();
                ItemId ItemToMoveId = new ItemId(item.Id.UniqueId.ToString());
                Item ItemToMove = Item.Bind(service, ItemToMoveId);
                ItemToMove.Move(SpamFolder.Id);
                //item.Move(SpamFolder.Id);