diff --git a/src/java/davmail/exchange/VCardReader.java b/src/java/davmail/exchange/VCardReader.java
index 2d5c0516..12822d8c 100644
--- a/src/java/davmail/exchange/VCardReader.java
+++ b/src/java/davmail/exchange/VCardReader.java
@@ -157,19 +157,19 @@ public class VCardReader extends ICSBufferedReader {
                     }
                 } else if (state == State.PARAM_NAME) {
                     if (currentChar == '=') {
-                        paramName = line.substring(startIndex, i);
+                        paramName = line.substring(startIndex, i).toUpperCase();
                         state = State.PARAM_VALUE;
                         paramValues = new HashSet<String>();
                         startIndex = i + 1;
                     } else if (currentChar == ';') {
                         // param with no value
-                        paramName = line.substring(startIndex, i);
+                        paramName = line.substring(startIndex, i).toUpperCase();
                         property.addParam(paramName, null);
                         state = State.PARAM_NAME;
                         startIndex = i + 1;
                     } else if (currentChar == ':') {
                         // param with no value
-                        paramName = line.substring(startIndex, i);
+                        paramName = line.substring(startIndex, i).toUpperCase();
                         property.addParam(paramName, null);
                         state = State.VALUE;
                         startIndex = i + 1;
diff --git a/src/test/davmail/exchange/TestExchangeSessionContact.java b/src/test/davmail/exchange/TestExchangeSessionContact.java
index fa107ae7..9308df23 100644
--- a/src/test/davmail/exchange/TestExchangeSessionContact.java
+++ b/src/test/davmail/exchange/TestExchangeSessionContact.java
@@ -298,7 +298,7 @@ public class TestExchangeSessionContact extends AbstractExchangeSessionTestCase
 
             VCardWriter vCardWriter = new VCardWriter();
             vCardWriter.startCard();
-            vCardWriter.appendProperty("TEL;TYPE=CELL;TYPE=PREF", "mobile");
+            vCardWriter.appendProperty("TEL;TYPE=CELL;TYPE=pref", "another mobile");
             vCardWriter.endCard();
 
             ExchangeSession.ItemResult result = session.createOrUpdateContact("testcontactfolder", itemName, vCardWriter.toString(), contact.etag, null);
@@ -306,8 +306,25 @@ public class TestExchangeSessionContact extends AbstractExchangeSessionTestCase
 
             contact = (ExchangeSession.Contact) session.getItem("testcontactfolder", itemName);
 
-            assertEquals("mobile", contact.get("mobile"));
+            assertEquals("another mobile", contact.get("mobile"));
 
     }
 
+    public void testLowerCaseTypesParamName() throws IOException {
+            ExchangeSession.Contact contact = (ExchangeSession.Contact) session.getItem("testcontactfolder", itemName);
+
+            VCardWriter vCardWriter = new VCardWriter();
+            vCardWriter.startCard();
+            vCardWriter.appendProperty("TEL;type=HOME;type=pref", "5 68 99 3");
+            vCardWriter.endCard();
+
+            ExchangeSession.ItemResult result = session.createOrUpdateContact("testcontactfolder", itemName, vCardWriter.toString(), contact.etag, null);
+            assertEquals(200, result.status);
+
+            contact = (ExchangeSession.Contact) session.getItem("testcontactfolder", itemName);
+
+            assertEquals("5 68 99 3", contact.get("homePhone"));
+        
+    }
+
 }