diff --git a/extract_outlook.py b/extract_outlook.py
index 7a00532..74b387e 100644
--- a/extract_outlook.py
+++ b/extract_outlook.py
@@ -42,11 +42,12 @@ def load_metadata(profile: pathlib.Path) -> dict[str, dict]:
         cursor.execute("""
             SELECT PathToDataFile, Message_SenderList, Message_SenderAddressList, 
                    Message_DisplayTo, Message_ToRecipientAddressList, Message_CCRecipientAddressList,
-                   Message_NormalizedSubject, Message_TimeReceived, Message_TimeSent, Message_MessageID
+                   Message_NormalizedSubject, Message_TimeReceived, Message_TimeSent, Message_MessageID,
+                   Threads_ThreadID
             FROM Mail
         """)
         for row in cursor:
-            path, s_list, s_addr, t_list, t_addr, cc_addr, subj, date_ts, sent_ts, msg_id = row
+            path, s_list, s_addr, t_list, t_addr, cc_addr, subj, date_ts, sent_ts, msg_id, thread_id = row
             if not path: continue
             uuid = pathlib.Path(path).stem
             meta[uuid] = {
@@ -57,6 +58,7 @@ def load_metadata(profile: pathlib.Path) -> dict[str, dict]:
                 "date": date_ts,
                 "sent_date": sent_ts,
                 "message_id": msg_id,
+                "thread_id": thread_id,
                 "attachments": []
             }
             
diff --git a/parsers/message.py b/parsers/message.py
index b5bcc66..9a6e6e2 100644
--- a/parsers/message.py
+++ b/parsers/message.py
@@ -147,6 +147,7 @@ def parse_message(data: bytes, meta: dict | None = None, attachments: list[tuple
         if meta.get("cc"): msg["Cc"] = meta["cc"]
         if meta.get("subject"): msg["Subject"] = meta["subject"]
         if meta.get("message_id"): msg["Message-ID"] = meta["message_id"]
+        if meta.get("thread_id"): msg["X-Outlook-Thread-ID"] = meta["thread_id"]
         
         ts_received = meta.get("date", -1)
         ts_sent = meta.get("sent_date", -1)