[horde] ActiveSync Connection

[Johannes Mock]

Hello together

I want to sync my Horde Server with different devices via ActiveSync. I
set all configurations and tried to sync. The device finds the server,
but said sync couln'd finish because username or password is incorrect.

Problem: Username and Password are correct.
The server syncs perfectly via CalDAV.

The configuration for my ActiveSync is the following:

$conf['activesync']['params']['driverconfig'] = 'horde';
$conf['activesync']['storage'] = 'Sql';
$conf['activesync']['emailsync'] = true;
$conf['activesync']['version'] = '14.1';
$conf['activesync']['auth']['params']['username_field'] =
'SSL_CLIENT_S_DN_CN';
$conf['activesync']['auth']['params']['password_source'] = 'none';
$conf['activesync']['auth']['type'] = 'basic_cert';
$conf['activesync']['autodiscovery'] = 'user';
$conf['activesync']['outlookdiscovery'] = false;
$conf['activesync']['logging']['type'] = false;
$conf['activesync']['ping']['heartbeatmin'] = 60;
$conf['activesync']['ping']['heartbeatmax'] = 2700;
$conf['activesync']['ping']['heartbeatdefault'] = 480;
$conf['activesync']['ping']['deviceping'] = true;
$conf['activesync']['ping']['waitinterval'] = 15;
$conf['activesync']['enabled'] = true;

and the ActiveSync specifications in the Virtual Host:

Alias /Microsoft-Server-ActiveSync /var/www/html/horde/rpc.php

  <Directory "/var/www/html/horde/">

        RewriteEngine On
        RewriteRule ^Microsoft-Server-ActiveSync /rpc.php
        RewriteRule .* -
[E=HTTP_MS_ASPROTOCOLVERSION:%{HTTP:Ms-Asprotocolversion}]
        RewriteRule .* - [E=HTTP_X_MS_POLICYKEY:%{HTTP:X-Ms-Policykey}]
        RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

   </Directory>

Did anyone have the same problem?! How can I connect to the server via
ActiveSync or what configuration parameters do I have to change?

Greetings
Johannes