diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8744a07..9355491 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ Changelog
 - Restore compatability with <8.0.0 configuration files (with deprecation warnings)
 - Move `parsedmarc.__version__` to `parsedmarc.meta.__version__`
 - Set default `reports_folder` to `Inbox` (rather than `INBOX`) when `msgraph` is configured
+- Mark a message as read when fetching a message from Microsoft Graph
 
 8.0.3
 -----
diff --git a/parsedmarc/mail/graph.py b/parsedmarc/mail/graph.py
index 2237b04..8be8e9a 100644
--- a/parsedmarc/mail/graph.py
+++ b/parsedmarc/mail/graph.py
@@ -63,9 +63,18 @@ class MSGraphConnection(MailboxConnection):
         emails = result.json()['value']
         return [email['id'] for email in emails]
 
+    def mark_message_read(self, message_id: str):
+        """Marks a message as read"""
+        url = f'/users/{self.mailbox_name}/messages/{message_id}'
+        resp = self._client.patch(url, data={"isRead": "true"})
+        if resp.status_code != 200:
+            raise RuntimeWarning(f"Failed to mark message read"
+                                 f"{resp.status_code}: {resp.json()}")
+
     def fetch_message(self, message_id: str):
         url = f'/users/{self.mailbox_name}/messages/{message_id}/$value'
         result = self._client.get(url)
+        self.mark_message_read(message_id)
         return result.text
 
     def delete_message(self, message_id: str):