Apache ServerName overwritten

[SebastianP]

I use a vServer with Plesk installed. I have some Problems with the default SSL vHost. For first setup, my provider tells me a Domain Name for use like somehost.someserver.net. After setting up the server, i added my own domainname to the server like mserver.de. If i would like to use a WebDav Share on https://myserver.de/webdav/ some clients cant connect to the server. I have found that the reason was a missconfigured default vHost at /opt/psa/admin/conf/generated/13645618820.53472000_server.include. Inside this there was a Directive

    <VirtualHost \
        my.ip.ad.res:443 \
            >
        ServerName "default-my_ip_ad_res"

. Only if i change ServerName manualy to

ServerName "myserver.de"

, some of my Clients could connect. As Hostname in Plesk myserver.de ist set. But every time, i change something via Plesk, a new configuration is written in the above directory and the ServerName Directive is changed back to "default-my_ip_ad_res". With this, some of the Clients could not connect.

Is there something i can do or any workaround? I hate it, to change it manualy.