diff --git a/src/Microsoft/Provider.php b/src/Microsoft/Provider.php
index a1089958f..005e26ded 100644
--- a/src/Microsoft/Provider.php
+++ b/src/Microsoft/Provider.php
@@ -179,7 +179,7 @@ protected function mapUserToObject(array $user)
             'id'       => $user['id'],
             'nickname' => null,
             'name'     => $user['displayName'],
-            'email'    => $user['userPrincipalName'],
+            'email'    => $user['mail'],
             'avatar'   => Arr::get($user, 'avatar'),
 
             'businessPhones'    => Arr::get($user, 'businessPhones'),