Send Vote options with Microsoft Graph API - microsoft-graph-api

Question

Is there a way, in Microsoft Graph API, using singleValueExtendedProperties or multiValueExtendedProperties, to send an email with voting options?
I can do it with using Microsoft.Exchange.WebServices and the following code, but I need a way to do it in Microsoft Graph API
public byte[] StringToByteArray(string hex)
{
if (hex.Length % 2 == 1)
throw new Exception("The binary key cannot have an odd number of digits");
byte[] arr = new byte[hex.Length >> 1];
for (int i = 0; i < hex.Length >> 1; ++i)
{
arr[i] = (byte)((GetHexVal(hex[i << 1]) << 4) + (GetHexVal(hex[(i << 1) + 1])));
}
return arr;
}
public int GetHexVal(char hex)
{
int val = (int)hex;
//For uppercase A-F letters:
//return val - (val < 58 ? 48 : 55);
//For lowercase a-f letters:
//return val - (val < 58 ? 48 : 87);
//Or the two combined, but a bit slower:
return val - (val < 58 ? 48 : (val < 97 ? 55 : 87));
}
public void TestEmail()
{
ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2013_SP1);
service.Credentials = new WebCredentials("xxxxxx#xxxxxx.xxx", "xxxxxxxxx");
service.Url = new Uri("https://outlook.office365.com/EWS/Exchange.asmx");
EmailMessage email = new EmailMessage(service);
email.ToRecipients.Add("xxx#xxxxxxx.xxx");
email.Subject = "Approval test from C#";
email.ReplyTo.Add("xxx#xxxxxxx.xxx");
string Header = "02010600000000000000";
string ReplyToAllHeader = "055265706C790849504D2E4E6F7465074D657373616765025245050000000000000000";
string ReplyToAllFooter = "0000000000000002000000660000000200000001000000";
string ReplyToHeader = "0C5265706C7920746F20416C6C0849504D2E4E6F7465074D657373616765025245050000000000000000";
string ReplyToFooter = "0000000000000002000000670000000300000002000000";
string ForwardHeader = "07466F72776172640849504D2E4E6F7465074D657373616765024657050000000000000000";
string ForwardFooter = "0000000000000002000000680000000400000003000000";
string ReplyToFolderHeader = "0F5265706C7920746F20466F6C6465720849504D2E506F737404506F737400050000000000000000";
string ReplyToFolderFooter = "00000000000000020000006C00000008000000";
string ApproveOption = "0400000007417070726F76650849504D2E4E6F74650007417070726F766500000000000000000001000000020000000200000001000000FFFFFFFF";
string RejectOtion = "040000000652656A6563740849504D2E4E6F7465000652656A65637400000000000000000001000000020000000200000002000000FFFFFFFF";
string VoteOptionExtras = "0401055200650070006C00790002520045000C5200650070006C007900200074006F00200041006C006C0002520045000746006F007200770061007200640002460057000F5200650070006C007900200074006F00200046006F006C00640065007200000741007000700072006F00760065000741007000700072006F007600650006520065006A0065006300740006520065006A00650063007400";
string DisableReplyAllVal = "00";
string DisableReplyVal = "00";
string DisableForwardVal = "00";
string DisableReplyToFolderVal = "00";
email.Body = new MessageBody();
email.Body.BodyType = BodyType.HTML;
email.Body.Text = "Body";
ExtendedPropertyDefinition VOTE_DEF = new ExtendedPropertyDefinition(Microsoft.Exchange.WebServices.Data.DefaultExtendedPropertySet.Common, 0x8520, Microsoft.Exchange.WebServices.Data.MapiPropertyType.Binary);
byte[] bytes = StringToByteArray(Header + ReplyToAllHeader + DisableReplyAllVal + ReplyToAllFooter + ReplyToHeader + DisableReplyVal + ReplyToFooter + ForwardHeader + DisableForwardVal + ForwardFooter + ReplyToFolderHeader + DisableReplyToFolderVal + ReplyToFolderFooter + ApproveOption + RejectOtion + VoteOptionExtras);
email.SetExtendedProperty(VOTE_DEF, bytes);
email.SendAndSaveCopy();
}

Answer 1

Yes using EWS API you can do this. But i failed to notice any documentation how to do so. Being said that i remember a related thread talks about this and see how you can use MAPI extended properties. If nothing works, consider filing an uservoice item(feature request) with Microsoft Graph team, so that they can consider implementing it.