diff --git a/src/applications/differential/customfield/DifferentialReviewersField.php b/src/applications/differential/customfield/DifferentialReviewersField.php
index 31b175b09d..91410cc5a3 100644
--- a/src/applications/differential/customfield/DifferentialReviewersField.php
+++ b/src/applications/differential/customfield/DifferentialReviewersField.php
@@ -1,109 +1,131 @@
 <?php
 
 final class DifferentialReviewersField
   extends DifferentialCoreCustomField {
 
   public function getFieldKey() {
     return 'differential:reviewers';
   }
 
   public function getFieldName() {
     return pht('Reviewers');
   }
 
   public function getFieldDescription() {
     return pht('Manage reviewers.');
   }
 
   protected function readValueFromRevision(
     DifferentialRevision $revision) {
     return $revision->getReviewers();
   }
 
   public function shouldAppearInPropertyView() {
     return true;
   }
 
   public function renderPropertyViewLabel() {
     return $this->getFieldName();
   }
 
   public function getRequiredHandlePHIDsForPropertyView() {
     return mpull($this->getUserReviewers(), 'getReviewerPHID');
   }
 
   public function renderPropertyViewValue(array $handles) {
     $reviewers = $this->getUserReviewers();
     if (!$reviewers) {
       return phutil_tag('em', array(), pht('None'));
     }
 
     $view = id(new DifferentialReviewersView())
       ->setUser($this->getViewer())
       ->setReviewers($reviewers)
       ->setHandles($handles);
 
     $diff = $this->getActiveDiff();
     if ($diff) {
       $view->setActiveDiff($diff);
     }
 
     return $view;
   }
 
   private function getUserReviewers() {
     $reviewers = array();
     foreach ($this->getObject()->getReviewers() as $reviewer) {
       if ($reviewer->isUser()) {
         $reviewers[] = $reviewer;
       }
     }
     return $reviewers;
   }
 
   public function getRequiredHandlePHIDsForRevisionHeaderWarnings() {
     return mpull($this->getValue(), 'getReviewerPHID');
   }
 
   public function getWarningsForRevisionHeader(array $handles) {
     $revision = $this->getObject();
 
     if (!$revision->isNeedsReview()) {
       return array();
     }
 
+    $viewer = $this->getViewer();
+
+    PhabricatorPolicyFilterSet::loadHandleViewCapabilities(
+      $viewer,
+      $handles,
+      array($revision));
+
     $all_resigned = true;
     $all_disabled = true;
     $any_reviewers = false;
+    $all_exiled = true;
 
     foreach ($this->getValue() as $reviewer) {
       $reviewer_phid = $reviewer->getReviewerPHID();
+      $handle = $handles[$reviewer_phid];
 
       $any_reviewers = true;
 
-      if (!$handles[$reviewer_phid]->isDisabled()) {
+      if (!$handle->isDisabled()) {
         $all_disabled = false;
       }
 
       if (!$reviewer->isResigned()) {
         $all_resigned = false;
       }
+
+      if (!$handle->hasCapabilities()) {
+        $all_exiled = false;
+      } else {
+        if ($handle->hasViewCapability($revision)) {
+          $all_exiled = false;
+        }
+      }
+
     }
 
     $warnings = array();
     if (!$any_reviewers) {
       $warnings[] = pht(
         'This revision needs review, but there are no reviewers specified.');
     } else if ($all_disabled) {
       $warnings[] = pht(
         'This revision needs review, but all specified reviewers are '.
         'disabled or inactive.');
     } else if ($all_resigned) {
       $warnings[] = pht(
         'This revision needs review, but all reviewers have resigned.');
+    } else if ($all_exiled) {
+      $warnings[] = pht(
+        'This revision needs review, but no reviewers have permission '.
+        'to view it.');
     }
 
     return $warnings;
   }
 
 }