diff --git a/pyexchange/connection.py b/pyexchange/connection.py
index 51feb5d..b1cb8b5 100644
--- a/pyexchange/connection.py
+++ b/pyexchange/connection.py
@@ -6,6 +6,7 @@
 """
 import requests
 from requests_ntlm import HttpNtlmAuth
+from requests.auth import HTTPBasicAuth
 
 import logging
 
@@ -39,7 +40,8 @@ def build_password_manager(self):
 
     log.debug(u'Constructing password manager')
 
-    self.password_manager = HttpNtlmAuth(self.username, self.password)
+    # self.password_manager = HttpNtlmAuth(self.username, self.password)
+    self.password_manager = HTTPBasicAuth(self.username, self.password)
 
     return self.password_manager
 
@@ -62,6 +64,10 @@ def send(self, body, headers=None, retries=2, timeout=30, encoding=u"utf-8"):
 
     try:
       response = self.session.post(self.url, data=body, headers=headers, verify = self.verify_certificate)
+      if response.status_code == 401:
+        self.password_manager = HttpNtlmAuth(self.username, self.password) 
+        self.session.auth = self.password_manager
+        response = self.session.post(self.url, data=body, headers=headers, verify = self.verify_certificate)
       response.raise_for_status()
     except requests.exceptions.RequestException as err:
       log.debug(err.response.content)
diff --git a/pyexchange/exchange2010/__init__.py b/pyexchange/exchange2010/__init__.py
index d27d939..3bdf265 100644
--- a/pyexchange/exchange2010/__init__.py
+++ b/pyexchange/exchange2010/__init__.py
@@ -510,6 +510,8 @@ def _parse_response_for_get_event(self, response):
 
     result['_conflicting_event_ids'] = self._parse_event_conflicts(response)
 
+    result[u'categories']  = self._parse_event_categories(response)
+
     return result
 
   def _parse_event_properties(self, response):
@@ -707,6 +709,10 @@ def _parse_event_conflicts(self, response):
     conflicting_ids = response.xpath(u'//m:Items/t:CalendarItem/t:ConflictingMeetings/t:CalendarItem/t:ItemId', namespaces=soap_request.NAMESPACES)
     return [id_element.get(u"Id") for id_element in conflicting_ids]
 
+  def _parse_event_categories(self, response):
+    categories = response.xpath(u'//m:Items/t:CalendarItem/t:Categories/t:String', namespaces=soap_request.NAMESPACES)
+    return [category.text for category in categories]
+
 
 class Exchange2010FolderService(BaseExchangeFolderService):
 
diff --git a/tests/exchange2010/fixtures.py b/tests/exchange2010/fixtures.py
index 81cdfa1..ef50036 100644
--- a/tests/exchange2010/fixtures.py
+++ b/tests/exchange2010/fixtures.py
@@ -336,6 +336,10 @@
                   <t:LastResponseTime>{resource.last_response:%Y-%m-%dT%H:%M:%SZ}</t:LastResponseTime>
                 </t:Attendee>
               </t:Resources>
+              <t:Categories>
+                  <t:String>dino</t:String>
+                  <t:String>saur</t:String>
+              </t:Categories>
 
               <t:ConflictingMeetingCount>1</t:ConflictingMeetingCount>
               <t:AdjacentMeetingCount>1</t:AdjacentMeetingCount>
diff --git a/tests/exchange2010/test_get_event.py b/tests/exchange2010/test_get_event.py
index 3078bef..fce8455 100644
--- a/tests/exchange2010/test_get_event.py
+++ b/tests/exchange2010/test_get_event.py
@@ -98,6 +98,9 @@ def test_required_attendees_are_required(self):
   def test_optional_attendees_are_optional(self):
     assert sorted(self.event.optional_attendees) == sorted(OPTIONAL_PEOPLE)
 
+  def test_categories_are_correct(self):
+    assert sorted(self.event.categories) == sorted(["dino", "saur"])
+
   def test_conflicting_event_ids(self):
     assert self.event.conflicting_event_ids[0] == TEST_CONFLICT_EVENT.id