diff --git a/src/java/davmail/exchange/ews/EWSMethod.java b/src/java/davmail/exchange/ews/EWSMethod.java
index 73a1f7c3..25a50a47 100644
--- a/src/java/davmail/exchange/ews/EWSMethod.java
+++ b/src/java/davmail/exchange/ews/EWSMethod.java
@@ -194,7 +194,7 @@ public abstract class EWSMethod extends PostMethod {
     }
 
     protected void writeItemId(Writer writer) throws IOException {
-        if (itemId != null) {
+        if (itemId != null || itemIds != null) {
             if (updates == null) {
                 writer.write("<m:ItemIds>");
             }