Subdomains redirect www prefix

[Luco]

Hey,

this is my first question in this community. We are starting to migrate our servers to Plesk and are building all necessary processes with the plesk xml api. everything works like a charme except this little problem.

If i create a subdomain via api

<subdomain>
    <add>
        <parent>domain.com</parent>
        <name>example</name>
        <property>
            <name>www_root</name>
            <value>httpdocs/web/</value>
        </property>
    </add>
</subdomain>

the vhost configuration at apache gets this part

<IfModule mod_rewrite.c>
        RewriteEngine On
        RewriteCond %{HTTP_HOST} ^subdomain.domain.com$ [NC]
        RewriteRule ^(.*)$ http://www.subdomain.domain.com$1 [L,R=301]
</IfModule>

so every subdomain is redirected to prefix www.
BUT if i create the subdomain via plesk panel, the mod_rewrite isnt created, as i want.
i also tried reconfigure-all, but this rewrite part is always active.

i have no possibility in plesk 12.0.18 to set the setting for www prefix like at normal sites.
So what can i do to prevent it and where can i change it afterwards?

thanks for every hint
kind regards

 

[Luco]

okay, i figured it out for myself
in global server settings, the default for "Preferred domain for websites" was set to www.domain.tld

i don´t know, why this affected subdomains, which never have www. prefix but i dont care