Changing WordPress' AUTH_SALT leads to users not being able to login

[schakko]

If the WordPress administrator has changed the AUTH_SALT in wp-config.php, users will no longer be able to log in.

To be able to change the AUTH_SALT but use the old salt for NADI, a new constant NEXT_ACTIVE_DIRECTORY_INTEGRATION_ENCRYPTION_KEY can be configured in wp-config.php.

Before changing the AUTH_SALT:

<?php
// wp-config.php
/**
 * The base configuration for WordPress
 */

// ...
define('AUTH_SALT', 'my_old_auth_salt');

After changing the AUTH_SALT:

<?php
// wp-config.php
/**
 * The base configuration for WordPress
 */

// ...
define('AUTH_SALT', 'my_new_auth_salt');
define('NEXT_ACTIVE_DIRECTORY_INTEGRATION_ENCRYPTION_KEY', 'my_old_auth_salt');

[schakko]

Both fixes solved the issue.