the example code updated the calendar in exchange server 2007(or Later) by web services method.
1 private static WebApplication2.EWS.ExchangeServiceBinding ExchangeSevicesBinding()
2 update start
93
94 // The change description lives within an ItemChange
95 //
96 ItemChangeType itemChange = new ItemChangeType();
97
98 itemChange.Item = calendarItemTypeItem.ItemId;
99
100 }
you must special attention to the red bold text .
if you update other item in exchange server,you can consult the follow xml style.
1 <?xml version="1.0" encoding="utf-8"?>
2 <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
3 xmlns:xsd="http://www.w3.org/2001/XMLSchema"
4 xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
5 xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
6 <soap:Body>
7 <UpdateItem MessageDisposition="SaveOnly" ConflictResolution="AutoResolve"
8 xmlns="http://schemas.microsoft.com/exchange/services/2006/messages">
9 <ItemChanges>
10 <t:ItemChange>
11 <t:ItemId Id="AAAtAEFkbW
" ChangeKey="CQAAABYA
"/>
12 <t:Updates>
13 <t:AppendToItemField>
14 <t:FieldURI FieldURI="item:Body"/>
15 <t:Message>
16 <t:Body BodyType="Text">Some additional text to append</t:Body>
17 </t:Message>
18 </t:AppendToItemField>
19 </t:Updates>
20 </t:ItemChange>
21 </ItemChanges>
22 </UpdateItem>
23 </soap:Body>
24 </soap:Envelope>
25
2 <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
3 xmlns:xsd="http://www.w3.org/2001/XMLSchema"
4 xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
5 xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
6 <soap:Body>
7 <UpdateItem MessageDisposition="SaveOnly" ConflictResolution="AutoResolve"
8 xmlns="http://schemas.microsoft.com/exchange/services/2006/messages">
9 <ItemChanges>
10 <t:ItemChange>
11 <t:ItemId Id="AAAtAEFkbW
12 <t:Updates>
13 <t:AppendToItemField>
14 <t:FieldURI FieldURI="item:Body"/>
15 <t:Message>
16 <t:Body BodyType="Text">Some additional text to append</t:Body>
17 </t:Message>
18 </t:AppendToItemField>
19 </t:Updates>
20 </t:ItemChange>
21 </ItemChanges>
22 </UpdateItem>
23 </soap:Body>
24 </soap:Envelope>
25