“Invalid Party object type 9” error when trying to send an email

If you get an “Invalid Party object type 9” error when you’re trying to send an email, either from code or from a workflow, it is because you have set the From Party to a team.

For instance:

//Defining Activity Parties
Entity toParty = new Entity(ActivityParty.EntityLogicalName);
Entity fromParty = new Entity(ActivityParty.EntityLogicalName);

//set partyid
toParty["partyid"] = new EntityReference(Contact.EntityLogicalName, contactGuid.Id);
fromParty["partyid"] = new EntityReference(Team.EntityLogicalName, consumerTeam.Id);


//create email entity
Entity email = new Entity(Email.EntityLogicalName);
email["from"] = new Entity[] { fromParty };
email["to"] = new Entity[] { toParty };
email["subject"] = "Account Login Information";
email["description"] = PopulateBody(userName, password);
email["directioncode"] = true;
email["regardingobjectid"] = new EntityReference(Contact.EntityLogicalName, contactGuid.Id);
Guid emailId = Create(email);


//Sending email
SendEmailRequest reqSendEmail = new SendEmailRequest();
reqSendEmail.EmailId = emailID; //ID of created mail
reqSendEmail.TrackingToken = "";
reqSendEmail.IssueSend = true;
SendEmailResponse res = (SendEmailResponse)Execute(reqSendEmail);

Or it could be that you set

fromParty["partyid"] = opportunity.OwnerId;

It’s completely valid for an Opportunity to have a Team as owner, but an email will only accept a SystemUser or a Queue as From Party.

So in the cases where the Opportunity owner is a SystemUser, the email will be sent. If the owner is a Team, it will generate the error above.

In order to send the mail, you must specify either a SystemUser or a Queue as From Party:

fromParty["partyid"] = new EntityReference(SystemUser.EntityLogicalName, fromUser.SystemUserId.Value);

or

fromParty["partyid"] = new EntityReference(Queue.EntityLogicalName, fromQueue.QueueId.Value);
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