diff --git a/src/Foundation/Authorization.hs b/src/Foundation/Authorization.hs
index 6c9a8369b..f3476fae4 100644
--- a/src/Foundation/Authorization.hs
+++ b/src/Foundation/Authorization.hs
@@ -401,7 +401,7 @@ data AuthorizationCacheKey
   | AuthCacheWorkflowInstanceInitiators WorkflowInstanceName RouteWorkflowScope
   | AuthCacheWorkflowInstanceWorkflowViewers WorkflowInstanceName RouteWorkflowScope
   | AuthCacheSchoolFunctionList SchoolFunction | AuthCacheSystemFunctionList SystemFunction
-  | AuthCacheLecturerList | AuthCacheCorrectorList | AuthCacheExamCorrectorList | AuthCacheTutorList | AuthCacheSubmissionGroupUserList
+  | AuthCacheLecturerList | AuthCacheExternalExamStaffList | AuthCacheCorrectorList | AuthCacheExamCorrectorList | AuthCacheTutorList | AuthCacheSubmissionGroupUserList
   | AuthCacheCourseRegisteredList TermId SchoolId CourseShorthand
   deriving (Eq, Ord, Read, Show, Generic, Typeable)
   deriving anyclass (Hashable, Binary)
@@ -660,7 +660,10 @@ tagAccessPredicate AuthLecturer = cacheAP' (Just $ Right diffMinute) mkLecturerL
     mkLecturerList _ route _ = case route of
       CourseR{} -> cacheLecturerList 
       AllocationR{} -> cacheLecturerList 
-      EExamR{} -> cacheLecturerList 
+      EExamR{} -> Just
+        ( AuthCacheExternalExamStaffList
+        , runDBRead . fmap (setOf $ folded . _Value) . E.select . E.from $ return . (E.^. ExternalExamStaffUser)
+        )
       _other -> Just
         ( AuthCacheSchoolFunctionList SchoolLecturer
         , runDBRead . fmap (setOf $ folded . _Value) . E.select . E.from $ \userFunction -> do
diff --git a/src/Handler/ExternalExam/Edit.hs b/src/Handler/ExternalExam/Edit.hs
index 48f4d70a0..05fe04e08 100644
--- a/src/Handler/ExternalExam/Edit.hs
+++ b/src/Handler/ExternalExam/Edit.hs
@@ -55,6 +55,7 @@ postEEEditR tid ssh coursen examn = do
       when (is _Nothing replaceRes) $ do
         audit $ TransactionExternalExamEdit eeId
 
+        memcachedByInvalidate AuthCacheExternalExamStaffList $ Proxy @(Set UserId)
         forM_ (eefStaff `setSymmDiff` staff) $ \change -> if
           | change `Set.member` eefStaff -> case change of
               Left invEmail -> do
diff --git a/src/Handler/ExternalExam/New.hs b/src/Handler/ExternalExam/New.hs
index e4f7dffac..b6ab5599f 100644
--- a/src/Handler/ExternalExam/New.hs
+++ b/src/Handler/ExternalExam/New.hs
@@ -42,6 +42,7 @@ postEExamNewR = do
         forM_ eefOfficeSchools' $ \ExternalExamOfficeSchool{..} ->
           audit $ TransactionExternalExamOfficeSchoolEdit eeId externalExamOfficeSchoolSchool
 
+        memcachedByInvalidate AuthCacheExternalExamStaffList $ Proxy @(Set UserId)
         let (invites, adds) = partitionEithers $ Set.toList eefStaff
             eefStaff' = do
               externalExamStaffUser <- adds