diff --git a/src/applications/auth/provider/PhabricatorLDAPAuthProvider.php b/src/applications/auth/provider/PhabricatorLDAPAuthProvider.php
--- a/src/applications/auth/provider/PhabricatorLDAPAuthProvider.php
+++ b/src/applications/auth/provider/PhabricatorLDAPAuthProvider.php
@@ -44,6 +44,8 @@
         ->setUsernameAttribute(
           $conf->getProperty(self::KEY_USERNAME_ATTRIBUTE))
         ->setRealNameAttributes($realname_attributes)
+        ->setEmailAttribute(
+          $conf->getProperty(self::KEY_EMAIL_ATTRIBUTE))
         ->setLDAPVersion(
           $conf->getProperty(self::KEY_VERSION))
         ->setLDAPReferrals(
@@ -188,6 +190,7 @@
   const KEY_DISTINGUISHED_NAME      = 'ldap:dn';
   const KEY_SEARCH_ATTRIBUTES       = 'ldap:search-attribute';
   const KEY_USERNAME_ATTRIBUTE      = 'ldap:username-attribute';
+  const KEY_EMAIL_ATTRIBUTE         = 'ldap:email-attribute';
   const KEY_REALNAME_ATTRIBUTES     = 'ldap:realname-attributes';
   const KEY_VERSION                 = 'ldap:version';
   const KEY_REFERRALS               = 'ldap:referrals';
@@ -211,6 +214,7 @@
       self::KEY_ANONYMOUS_USERNAME => pht('Anonymous Username'),
       self::KEY_ANONYMOUS_PASSWORD => pht('Anonymous Password'),
       self::KEY_USERNAME_ATTRIBUTE => pht('Username Attribute'),
+      self::KEY_EMAIL_ATTRIBUTE => pht('Email Attribute'),
       self::KEY_REALNAME_ATTRIBUTES => pht('Realname Attributes'),
       self::KEY_VERSION => pht('LDAP Version'),
       self::KEY_REFERRALS => pht('Enable Referrals'),
@@ -286,6 +290,9 @@
       self::KEY_USERNAME_ATTRIBUTE =>
         pht('Example: %s',
           phutil_tag('tt', array(), pht('sn'))),
+      self::KEY_EMAIL_ATTRIBUTE =>
+        pht('Example: %s',
+          phutil_tag('tt', array(), pht('userPrincipalName'))),
       self::KEY_REALNAME_ATTRIBUTES =>
         pht('Example: %s',
           phutil_tag('tt', array(), pht('firstname, lastname'))),
@@ -374,6 +381,8 @@
         'prefill the "Real Name" field when registering a new account. This '.
         'is purely cosmetic and does not affect the login process, but can '.
         'make registration a little easier.'),
+      self::KEY_EMAIL_ATTRIBUTE => pht(
+        "Optionally, specify an attribute to use to select the user's email."),
     );
 
     foreach ($labels as $key => $label) {