diff --git a/docs/display-parameters.rst b/docs/display-parameters.rst
index d982f4f..1604752 100644
--- a/docs/display-parameters.rst
+++ b/docs/display-parameters.rst
@@ -54,3 +54,12 @@ You can disable the expire status panel:
 .. code-block:: php
 
     $show_expirestatus = false;
+
+Validity status
+---------------
+
+You can disable the validity status panel:
+
+.. code-block:: php
+
+    $show_validitytatus = false;
diff --git a/docs/index.rst b/docs/index.rst
index a0bf276..1ba49f3 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -27,6 +27,7 @@ LDAP Tool Box Service Desk documentation
    resetpassword.rst
    lockaccount.rst
    enableaccount.rst
+   updatestartendtime.rst
    hook.rst
    dashboards.rst
    configuration-mail.rst
diff --git a/docs/presentation.rst b/docs/presentation.rst
index dbbc088..6151b05 100644
--- a/docs/presentation.rst
+++ b/docs/presentation.rst
@@ -17,10 +17,12 @@ Features
 * Test current password
 * Reset password and force password change at next connection
 * Lock and unlock account
+* Update account validity dates
 * Create and view audit logs
 * Dashboards:
 
   * Accounts locked
   * Accounts with a password that will soon expire
   * Accounts with an expired password
-  * Accounts idle (never connected or not connected since a number of days)
\ No newline at end of file
+  * Accounts idle (never connected or not connected since a number of days)
+  * Accounts invalid (for which start date is in the future, or end date is in the past)
diff --git a/docs/updatestartendtime.rst b/docs/updatestartendtime.rst
new file mode 100644
index 0000000..5f1c855
--- /dev/null
+++ b/docs/updatestartendtime.rst
@@ -0,0 +1,39 @@
+Update start and end validity dates
+===================================
+
+Some LDAP directories provide attributes to define start and end account validify dates.
+
+For OpenLDAP since 2.5 version, attributes are ``pwdStartTime`` and ``pwdEndTime``.
+
+For Active Directory, only end time is available, in ``accountExpires`` attribute.
+
+Show validity status
+-------------------
+
+Service Desk will display if account is valid or not. To allow this feature:
+
+.. code-block:: php
+
+    $show_validitystatus = true;
+
+Update start date
+-----------------
+
+This feature allows to edit the account start validity date. This requires to have the `starttime` field defined in the attributes map.
+
+To enable this feature:
+
+.. code-block:: php
+
+    $use_updatestarttime = true;
+
+Update end date
+-----------------
+
+This feature allows to edit the account end validity date. This requires to have the `endtime` field defined in the attributes map.
+
+To enable this feature:
+
+.. code-block:: php
+
+    $use_updateendtime = true;
diff --git a/docs/upgrade.rst b/docs/upgrade.rst
index e1f84c9..65fa2e6 100644
--- a/docs/upgrade.rst
+++ b/docs/upgrade.rst
@@ -4,7 +4,7 @@ Upgrade
 From 0.5 to 0.6
 ---------------
 
-bundled dependencies
+Bundled dependencies
 ~~~~~~~~~~~~~~~~~~~~
 
 The dependencies are now explicitly listed in the service-desk package, including the bundled ones.
@@ -15,7 +15,7 @@ You can find bundled dependencies list:
 * in Provides field in rpm package
 
 
-configuration
+Configuration
 ~~~~~~~~~~~~~
 
 The configuration files are now in ``/etc/service-desk`` directory.
@@ -29,7 +29,7 @@ Please take in consideration that ``config.inc.php`` is now replaced systematica
 
 Avoid as much as possible editing the ``/etc/service-desk/config.inc.php`` file. Prefer modifying the ``/etc/service-desk/config.inc.local.php``.
 
-password policy
+Password policy
 ~~~~~~~~~~~~~~~
 
 When you change the password for a user, you can now configure a local password policy for ensuring the password strength is sufficient.
@@ -43,7 +43,7 @@ You can give a look to the :doc:`password policy documentation <ppolicy>` for mo
    The local password policy is now defined in a library: `ltb-common <https://github.com/ltb-project/ltb-common>`_.
 
 
-cache cleaning
+Cache cleaning
 ~~~~~~~~~~~~~~
 
 Now the cache is being cleaned-up during service-desk upgrade / install.
@@ -51,7 +51,7 @@ Now the cache is being cleaned-up during service-desk upgrade / install.
 This is intended to avoid smarty problems due to service-desk templates upgrade, and possibly smarty upgrade itself.
 
 
-dependencies update
+Dependencies update
 ~~~~~~~~~~~~~~~~~~~
 
 Removed packaged dependencies:
@@ -117,7 +117,6 @@ Removed bundled dependencies:
 Note that hidden files (.gitignore,...) from bundled dependencies are now removed from packages.
 
 
-
 Last authentication time and idle accounts
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -142,3 +141,18 @@ You can enable this feature by setting a non-zero value to the page size paramet
 .. code-block:: php
 
    $ldap_page_size = 100;
+
+Account validity
+~~~~~~~~~~~~~~~~
+
+Account validity feature is enabled by default. For OpenLDAP it relies on ``pwdStartTime`` and ``pwdEndTime`` attributes available since OpenLDAP 2.5.
+For Active Directory, only the end time is available, in ``accountExpires`` attribute.
+
+You can disable this new feature if you don't want to use it:
+
+.. code-block:: php
+
+   $show_validitystatus = false;
+   $use_updatestarttime = false;
+   $use_updateendtime = false;
+   $use_searchinvalid = false;