Thank you for your follow-up.
Each Sitefinity license can be used for an unlimited number of sub-domains, i.e. by registering a key for mysite.com, you will be able to use it for all subdomains - www.mysite.com
, etc.). This applies to complex country-specific domain names like yours.
Please feel free to use a sub-domain for your intranet website (e.g. "intranet.jurfak.spb.ru")
and let us know if you encounter any issues.
You are welcome to refer to the following forum post:
Let me know if I can assist you further.
the Telerik team