diff --git a/src/java/davmail/exchange/ExchangeSession.java b/src/java/davmail/exchange/ExchangeSession.java
index a007a26a..228f7150 100644
--- a/src/java/davmail/exchange/ExchangeSession.java
+++ b/src/java/davmail/exchange/ExchangeSession.java
@@ -1733,7 +1733,14 @@ public abstract class ExchangeSession {
             writer.appendProperty("X-AIM", get("im"));
 
             writer.appendProperty("BDAY", convertZuluDateToBday(get("bday")));
-            writer.appendProperty("X-ANNIVERSARY", convertZuluDateToBday(get("anniversary")));
+            writer.appendProperty("ANNIVERSARY", convertZuluDateToBday(get("anniversary")));
+
+            String gender = get("gender");
+            if ("1".equals(gender)) {
+                writer.appendProperty("SEX", "2");
+            } else if ("2".equals(gender)) {
+                writer.appendProperty("SEX", "1");
+            }
 
             writer.appendProperty("CATEGORIES", get("keywords"));
 
@@ -2781,8 +2788,8 @@ public abstract class ExchangeSession {
                 properties.put("im", property.getValue());
             } else if ("BDAY".equals(property.getKey())) {
                 properties.put("bday", convertBDayToZulu(property.getValue()));
-            } else if ("X-ANNIVERSARY".equals(property.getKey())) {
-                 properties.put("anniversary", convertBDayToZulu(property.getValue()));
+            } else if ("ANNIVERSARY".equals(property.getKey())) {
+                properties.put("anniversary", convertBDayToZulu(property.getValue()));
             } else if ("CATEGORIES".equals(property.getKey())) {
                 properties.put("keywords", property.getValue());
             } else if ("CLASS".equals(property.getKey())) {
@@ -2793,6 +2800,13 @@ public abstract class ExchangeSession {
                     properties.put("sensitivity", "2");
                     properties.put("private", "true");
                 }
+            } else if ("SEX".equals(property.getKey())) {
+                String propertyValue = property.getValue();
+                if ("1".equals(propertyValue)) {
+                    properties.put("gender", "2");
+                } else if ("2".equals(propertyValue)) {
+                    properties.put("gender", "1");
+                }
             } else if ("X-ASSISTANT".equals(property.getKey())) {
                 properties.put("secretarycn", property.getValue());
             } else if ("X-MANAGER".equals(property.getKey())) {
@@ -2834,7 +2848,7 @@ public abstract class ExchangeSession {
                 LOGGER.warn("Invalid date: " + value);
             }
         }
-        
+
         return result;
     }
 
@@ -3187,7 +3201,7 @@ public abstract class ExchangeSession {
         CONTACT_ATTRIBUTES.add("haspicture");
         CONTACT_ATTRIBUTES.add("keywords");
         CONTACT_ATTRIBUTES.add("othermobile");
-
+        CONTACT_ATTRIBUTES.add("gender");
         CONTACT_ATTRIBUTES.add("private");
         CONTACT_ATTRIBUTES.add("sensitivity");
     }
diff --git a/src/java/davmail/exchange/dav/Field.java b/src/java/davmail/exchange/dav/Field.java
index 788b24a1..86447fc2 100644
--- a/src/java/davmail/exchange/dav/Field.java
+++ b/src/java/davmail/exchange/dav/Field.java
@@ -249,6 +249,8 @@ public class Field {
         createField(URN_SCHEMAS_CONTACTS, "othercountry"); // PR_OTHER_ADDRESS_COUNTRY 0x3A60 String
         createField(URN_SCHEMAS_CONTACTS, "othercity"); // PR_OTHER_ADDRESS_CITY 0x3A5F String
 
+        createField(URN_SCHEMAS_CONTACTS, "gender"); // PR_GENDER 0x3A4D Integer16
+
         createField("keywords", SCHEMAS_EXCHANGE, "keywords-utf8", PropertyType.StringArray); // PS_PUBLIC_STRINGS Keywords String
         //createField("keywords", DistinguishedPropertySetType.PublicStrings, "Keywords", ); // PS_PUBLIC_STRINGS Keywords String
 
diff --git a/src/java/davmail/exchange/ews/Field.java b/src/java/davmail/exchange/ews/Field.java
index 0cce0bbf..dbed37ff 100644
--- a/src/java/davmail/exchange/ews/Field.java
+++ b/src/java/davmail/exchange/ews/Field.java
@@ -141,6 +141,8 @@ public class Field {
         FIELD_MAP.put("othercountry", new ExtendedFieldURI(0x3A60, ExtendedFieldURI.PropertyType.String));
         FIELD_MAP.put("othercity", new ExtendedFieldURI(0x3A5F, ExtendedFieldURI.PropertyType.String));
 
+        FIELD_MAP.put("gender", new ExtendedFieldURI(0x3A4D, ExtendedFieldURI.PropertyType.Short));
+
         FIELD_MAP.put("keywords", new ExtendedFieldURI(ExtendedFieldURI.DistinguishedPropertySetType.PublicStrings, "Keywords", ExtendedFieldURI.PropertyType.StringArray));
 
         FIELD_MAP.put("private", new ExtendedFieldURI(ExtendedFieldURI.DistinguishedPropertySetType.Common, 0x8506, ExtendedFieldURI.PropertyType.Boolean));