How to assign Tasks to other users using Exchange Web Service.

Question

How to assign Tasks to other users using Exchange Web Service.
Any workaround also would help

Answer 1

Hi Glen,
I am trying to use ExtendedPropertyType and put in UpdaterItemType as in this code as below. Although it is not updating the Owner
field.
I have tried it both by Propertyname and PropertyID. Although new custom property's canbe
added but to change an existing one like 'Owner' ? Would this be the right method.
2. And Is ProprertyID a fixed value as 0x811f or does it need to be calculated.
3. Is 'Owner' the right propertname for assigning a task ?
Thanks a lot.
Please see code below for reference.
 PathToExtendedFieldType pathExtended = new PathToExtendedFieldType();
            //pathExtended.DistinguishedPropertySetId = DistinguishedPropertySetType.PublicStrings;
            pathExtended.DistinguishedPropertySetId = DistinguishedPropertySetType.Task;
            pathExtended.DistinguishedPropertySetIdSpecified = true;
            pathExtended.PropertyId = 0x811f;
            pathExtended.PropertyIdSpecified = true;
            //pathExtended.PropertyName = "Owner";
            pathExtended.PropertyType = MapiPropertyTypeType.String;
            ciSetAT.ExtendedProperty = new ExtendedPropertyType[1];
            ciSetAT.ExtendedProperty[0] = new ExtendedPropertyType();
            ciSetAT.ExtendedProperty[0].ExtendedFieldURI = pathExtended;
            ciSetAT.ExtendedProperty[0].Item = "[email protected]";
            SetItemFieldType set1 = new SetItemFieldType();
            set1.Item = pathExtended;
            set1.Item1 = ciSetAT;
            UpdateItemType request = new UpdateItemType();
            request.ItemChanges = new ItemChangeType[1] { new ItemChangeType() };
            request.ItemChanges[0].Item = itemId;
            request.ItemChanges[0].Updates = new ItemChangeDescriptionType[2];
            request.ItemChanges[0].Updates[0] = setstart;
            request.ItemChanges[0].Updates[1] = set1;